Advice Needed

I have a major decision to make and i am at wits end.I just purchased an iMac 17" core 2 duo with a 2.17 Ghz processor,superdrive,built in isight,160GB HDD,built in bluetooth.I purchased this 2 weeks before the new iMac came out.

Problem:I was going to purchase the new iMac 2.0 Ghz processor and give my wife the 17".My wife only wants to play games and do light things on the machine, as for myself im a power user and think i will actually be at a loss if i were to purchase the new 20".

So im asking the community this question:
Should i keep my 17" and possibly purchase her a cheap computer(because she only wants to surf the net and play video games on the merchandise)?
Or should i bow down and give her the faster 17" and buy myself the 20"(which i am a power user and this will not be of benefit for me)
So what should i do?
Regards

At a loss - why? The new 20" has a better video card than the previous 17". As for the speed difference in the CPU - it will probably never be seen nor noticed by you unless you're running a speed test or encoding a video, timing the result between the 2 machines. My guess would be maybe 1 to 2 seconds faster per minute of encode time.

As to whether to get another Mac or a cheap windows machine - only you can answer that one.

Well i paid 1,200 bucks for the current iMac that i own.But it seems kind of sick to purchase a new one and give her my current iMac just so she can play games on.Thanks for the advice.Not sure what i will do as of yet.

i would save the money and go for a Mac Mini. they are pretty decent.