Right now I have a twin sized bed. The size is okay since it's just me and my cat, however sometimes I feel like it could stand to be a little bigger (longer really). The problem is I can't stand the mattress. Since I hate it so much I end up sleeping on the couch in my family room nearly every night. My dad has offered to buy me a Tempurpedic for it, either original, classic, or symphony, as they all come in twin and aren't too expensive.
My other option is to get a new full sized bed frame (I want this one or this one) and a cheaper mattress, like $600 or less.
Which option would you go with? I really know nothing about mattresses so I'm wondering if Tempurpedic is worth sleeping in a smaller bed? or would I have no trouble finding a comfy full sized mattress for that price? I've been looking around online but I can't tell if something is comfy over the internet. Hopefully I'm going to go look at mattresses soon.