Forgot to mention I have the Eureka Equinox 6. 6'7 center height and near vertical walls are nice! Its been through everything and held up well for 5 years of campin with 2 labs. lol. Had one zipper fail and Eureka sent me new one free. :) I use a tarp under my tent and wool army blankets on...
I have had a SD Strecth dome for over 15 yrs. . They make good stuff. My only concern might be the plastic connoctors where the poles attach on roof. If one of those break you are pretty much screwed. Eureka makes some quality tents also and are Made in U.S.A