Actually for linux, 2 gigs of RAM is plenty. I have 4 gigs in my desktop and rarely if ever exceed 50% in use. Swap is never touched at all.
I guess you could price match against a netbook or a desktop system too, for full comparison. I picked system 76 on purpose, as linux installed machines is a niche market, and comparing to something like Fry's electronics (one of my fave's) or best buy would be unfair.