Just out of curiosity... my iMac 20" for a 17" notebook?

[About2SwitchOvr]

I just got this iMac 20", mint condition, nothing wrong with it at all. Added an extra 512 stick. I'm wondering if anyone out there in MacWorld would be in SOME sort of trade off here. I was eyeballing the 17" powerbooks...

Let me know? THANKS