Well, this is a difficult set of parameters. No tents will actually fill all your needs. Here is one that comes closest to the weight, weather-proof, warmth and foot print, but you loose some head height and vestibule space. Expense??? well that is out the ceiling...
Check this: http://www.backpackinglight.com/cgi-bin/backpackinglight/terra_nova_laser_ultra_1_tent_review.html
There are a few others. Again, listed in the same review. This is several years old, though.
Z-Packs makes a pretty good 3 season tent here: http://zpacks.com/shelter/hexamid_long.shtml
These take some time to set up and want a higher stick or hiking staff.
As far as a component system goes, The Yama people make a pretty good net tent that fills most requirements at about 9oz. This is mounted to the poles used for a tarp. A good tarp is about 8x11 to cover the net tent relatovly tightly. Z packs makes one at around 7.2oz. But, you need treking poles or you need to get carbon fiber poles.
A smaller tarp will work with a piece of netting over your head area. Lots of different combo's for this, but avoid gadgets. They never work as advertised, it seems.
I use a simple 9x11 tarp. Generally, nights are cool enough to keep most bugs down to tolerable levels. A 2oz piece of mesh covers that, OK. Carefull selection of ground, means I don't need to worry about heavy rains. The somewhat large tarp means cover with shifting winds. The tarp, stakes, and hiking staff weigh ~22oz for everything, easy to set up, really a large area, cook under it, etc. But, again, you are back to using at least one hiking staff.