One more update:
After all this, I finally decided to get one, but not any of the ones listed in the original post

After talking to one of my professors this afternoon - a guy who's been hiking for decades, and should know what he's talking about - I decided to get a
Kelty Cyclone 2. He gets a deal on these tents through school since he takes a group out hiking as a summer class every year, and offered to help me get one if I wanted to...so I can get the Cyclone for less than $170.
As for my parents - it was their tent that bit the dust, after all; I'm just getting another one so my girfriend can come with me

- They're probably going to order a tent when I order mine, but they're going for a cabin-style tent. Probably a
Mantra or a
Valhalla.
Thanks for the help, everybody!
Nate