If I was shopping for a tent these days I'd look at some of the newer designs that have funky pole setups to make the walls more vertical, seems like some smart thinking.
Those new thermarest neo-air mattresses are tempting weight-wise, but I tried one in REI and didn't care for the feel... they are more like old-fashioned air mattresses than traditional thermarest. I actually sleep just fine on a z-rest, but when I'm backpacking I usually carry a short ultralight thermarest since it's so much more packable, even though it's a few ounces heavier.
Sleeping bags: those "hugger" designs get pretty good reviews for their warmth:weight ratio, but I've never tried one. You can find super-light, high-quality down bags by Western Mountaineering, Feathered Friends, Marmot, Mont-Bell, etc... I have a Marmot Helium for backpacking but for summer car camping I just use a cheap old synthetic Sierra Designs bag. The Helium is a beautiful bag though in warmer weather I wish for foot ventilation and in colder weather I wish for a draft collar.