Okay, so I haven't read a lot of Jan & Hank, and I don't think I've ever read them outside of Avengers comics, but here are two trades I'd recommend:
Avengers Visionaries: George Perez (http://www.amazon.com/Avengers-Visionaries-George-Perez-Collection/dp/0785107177) collects a hodgepodge of Avengers issues from the late 70's (issues 161-162, 194-196, 201, and annuals 6 and 8) and most of them have a focus on Jan & Hank, and give a good view of their ups and downs as a couple. If you don't mind the storytelling from that era, it's good.
Avengers: World Trust (http://www.amazon.com/Avengers-World-Trust-Geoff-Johns/dp/B005IUUB4M) (AKA Avengers volume 3 issues 56-62) has a pretty mediocre storyline about a mysterious entity that dumps all the world capital cities, next to each other, into a separate dimension. Hank and Jan were the only Avengers in DC at the time, so they end up in peril while the other Avengers search for answers. Has some pretty good emotional beats & good characterization of everybody. Also the trade has a fun-but-bizare one-shot where the Avengers are drawn in Simpsons-style.
And a few issues later in volume 3 there's issue 71 (http://www.amazon.com/Avengers-71/dp/B008RAVGYO), which is entirely about Jan & Hank taking a vacation in Las Vegas. On the downside, it has a super-villain who is stalking Jan and attacks her in the skeeviest way possible. And the Hank/Jan stuff is a bit awkward, a bit sweet. On the plus side, it shows them using their size-changing abilities. In bed. Probably only worth getting if you can get it electronically or if you're okay reading it as part of the The Search for She-Hulk (http://www.amazon.com/Avengers-Vol-The-Search-She-Hulk/dp/0785112022) trade, although only that issue has Hank/Jan I think (I haven't actually read the whole trade).
One nice thing is that Red Zone happens right between World Trust and The Search for She-Hulk, so you can read all three in a row, and get some Steve/Tony with your Hank/Jan that way. Again, the plots probably won't blow you away, but the characterization is pretty strong.
Salmastryon, sorry for info-dumping my Hank/Jan favorite moments in your post. Honestly not trying to step on your toes, but it's hard because Avengers comic recs are like my favorite thing ever. ;-)
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Avengers Visionaries: George Perez (http://www.amazon.com/Avengers-Visionaries-George-Perez-Collection/dp/0785107177) collects a hodgepodge of Avengers issues from the late 70's (issues 161-162, 194-196, 201, and annuals 6 and 8) and most of them have a focus on Jan & Hank, and give a good view of their ups and downs as a couple. If you don't mind the storytelling from that era, it's good.
Avengers: World Trust (http://www.amazon.com/Avengers-World-Trust-Geoff-Johns/dp/B005IUUB4M) (AKA Avengers volume 3 issues 56-62) has a pretty mediocre storyline about a mysterious entity that dumps all the world capital cities, next to each other, into a separate dimension. Hank and Jan were the only Avengers in DC at the time, so they end up in peril while the other Avengers search for answers. Has some pretty good emotional beats & good characterization of everybody. Also the trade has a fun-but-bizare one-shot where the Avengers are drawn in Simpsons-style.
And a few issues later in volume 3 there's issue 71 (http://www.amazon.com/Avengers-71/dp/B008RAVGYO), which is entirely about Jan & Hank taking a vacation in Las Vegas. On the downside, it has a super-villain who is stalking Jan and attacks her in the skeeviest way possible. And the Hank/Jan stuff is a bit awkward, a bit sweet. On the plus side, it shows them using their size-changing abilities. In bed. Probably only worth getting if you can get it electronically or if you're okay reading it as part of the The Search for She-Hulk (http://www.amazon.com/Avengers-Vol-The-Search-She-Hulk/dp/0785112022) trade, although only that issue has Hank/Jan I think (I haven't actually read the whole trade).
One nice thing is that Red Zone happens right between World Trust and The Search for She-Hulk, so you can read all three in a row, and get some Steve/Tony with your Hank/Jan that way. Again, the plots probably won't blow you away, but the characterization is pretty strong.
Salmastryon, sorry for info-dumping my Hank/Jan favorite moments in your post. Honestly not trying to step on your toes, but it's hard because Avengers comic recs are like my favorite thing ever. ;-)