Just to enter the fray ... the best tent IMO is the Sierra Designs Zeta 2 (and its big brother the Zeta 3).  I have one of each.  They have two doors and two vestibules, one of which is big enough to crouch down in, adequate height, full-length fly, 6-1/2 lbs for the 2-man.

Too bad it's no longer made.  Here's the sheet of pitching instructions in case someone is interested.
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The Flash series might be of interest.
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