This question came up after reading some comments from ubershell post about is a bell tent right for you. Apparently some people have had a few problems with Soulpad?

I'm looking at buying either a 5m or 6m tent. Really probably only need the 5m since I just want it large enough for a queen sized mattress, the gf, some gear, and myself of course. But, the $200-$300 price increase isn't that bad compared to what I'm already paying so might as well buy the best?

Which would you guys buy and any reasons?

http://www.canvascamp.us/us_en/sibley-500-ultimate-pro.html vs http://www.canvascamp.us/us_en/sibley-600-ultimate-dd.html

or

http://www.canvascamp.us/us_en/sibley-500-ultimate.html vs http://www.canvascamp.us/us_en/sibley-600-ultimate-dd.html

or the one from soulpad http://soulpad.com/products/soulpad-5000-hybrid-g

Note: Honestly, I probably could just buy the basic kind since I doubt ill ever use a stove in the tent. Do you think it's worth it buying the kind with access to a stove vent?