You must be kidding, aren't you ? 3.500 is more than enough ...
6000 is what I've saved up for the iMac so far. It includes buying a thunderbolt hdd though. Though in Norway you get a lot less fr the dollar than in the US, a lot!
But I'm not gonna pay this only to get retina. I just checked my friends new retina laptop. Retina is nice but its not a killer feature at all. It sharp, but problem is that pixels of everything else non-retina comes out much more pixelated. I prefer the regular screen currently to be honest until all softwares are retina. The contrast and color level and glare on the other hand is awesome on the rMBP.
Anyway, I'm going to max out every possible feature in my next iMac no matter what that costs.