I believe if you were to sell all of your GC stuff, then you would probably take a loss on your investment. Personally, the CheapAss I am, I would never want to take a loss on my investments; But looking at the number of games that you own(34, WOW! :shock: ) , It would probably only make sense to get a PS2 since they have more titles to "try out", maybe not own necessarrily.
So I would say if you were to get a good amount back for your GC (and games!), then go for it in getting a PS2. About PS3, All I can predict with that is you will probably be shelling out $300 if not more when Fall of 2005 swings around. PS2 will probably still have support for games for 2 or 3 years after 2005, but you just won't get the best possible graphics and some outstanding looking first Titles will be exclusive to PS3...but PS2 should keep you excited with many titles.
Well thats my 2cents or many cents....If you are bright with your money, then you probably already thought about all of this. I own a GC too, and I actually think PS2 and Xbox are probably both fine upgrades, but of course PS2 is the best for number of Titles. Ive always thought of upgrading too, but since I don't have a whole lot of time (and money) to play many games anyways, then Im willing to stick with the same ole. If highest quality in resolution and sound is what you want then go with Xbox...But you seem more like a PS2 person because the more variety in games is what you Crave!