Mattress Forum

I am a 22-year-old guy who just moved to a new city and has been on an airmattress for the last two weeks.  Long story short, I'm buying a bed this weekend.  I got it down to either bedinabox or a night therapy bed from sams club.  Then I discovered this site, heard about foambymail, and saw I could get a 5.3lb memory foam bed for next to nothing.  Should I do it?  Or would bedinabox / night therapy be better?

I'm wondering if it will "sleep hot" and if there is any quality issue I should be aware of.  I'm also wondering if I making a mistake by not getting an expensive mattress.  Cost is not too much of an issue - I am cheap with most things, but I had allotted up to $1500 for this purchase.  Ive been erring towards the cheaper side (eg Night Therapy) because I'm young and will probably be in and out of apartments / switching cities, etc, and also because I like saving money if the product is still good.

Anyways, thoughts on foambymail, bedinabox, night therapy, or anything else I should know?  This airbed I'm on is driving me insane, I am definitely buying this weekend.