I will throw in with the Eureka Apex 2XT, which may be snug for two to share who are not super-friendly. It meets all the other requirements and will not break the bank, seeing as you can get one for $100. I love everything about mine except the weight. It weighs around 5lbs on the trail. Split between two people, that would not be so bad.

Or there is the GoLite Imogene UL2 which is MUCH lighter at 2lb 6oz,and from what I can tell, pretty much the same size. They cost about $250 and are currently out of stock, but are expected to be in stock mid July.
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