No love for the Karnov? 11/17 VTOL, plus it is dirt cheap. 125BV to carry 6 tons of infantry! Only downside is that I guess it wouldn't work on airless moons or other places where an ICE engine won't run.
The Bolla Stealth Tank can be pretty interesting if you like C3. It has stealth armor and I believe it is an Omni, so you get the 4T bay inside plus another squad hanging outside. Also, I don't believe carrying BA outside the tank affects the ability to use stealth armor, so you can still get the benefits. The down-side is that they are expensive units, and they are wheeled.
Honestly, I like my APC's cheap and either hover or VTOL. I don't really want them to carry more than two squads (three if they are Omni's) because I don't want to spend more than a turn or two sitting still to unload. I tend to stay away from the fancier stuff and either use dirt cheap units like the Karnov or the heavy hover APC from 3060, or slightly nicer hovers with missile racks that I can use to lob smoke or infernos (hey, fires are another way to make smoke!) So, the Svantovit and Maxim upgrades work well for me. I also like the Tyr quite a bit, but prefer the Kurita version as the Streaks on the Clan version can't fire special ammo, but the MML's on the Kurita version can.
If the terrain makes hovers a no-go, I'd probably stick with the Karnovs. If even the Karnovs couldn't find a place to land (like on a complete forest map) than I'd just hang the BA off an omnimech.