Nice setup - congrats. You haven't wasted money if it's what you want, surely?
I made a mistake jumping to a Windows Vista machine over the summer (which I sold at a loss to buy the iMac). I really wanted to get back into PC gaming because I love it so much and my old iMac (a 17" Core Duo model) couldn't cope with anything.
I realise now that pretty much every good game is out for Xbox 360 and there isn't much at all exclusively on PC. I do still game on my iMac but the performance is downright miserable.
Oh well, an error of judgement that will not be repeated.
Part of the reason I went to PC was because the iMac that had just come out in August didn't really interest me and I still think it's pretty ugly but I spent all of my time with my MacBook connected to a monitor so I just decided it was time to go back to iMac. I'm missing the ability to stick the remote to the enclosure and also the sleep light. Why on earth would they ditch these?!