Yeah after thinking about it a lot I will get a new slim one even though it has less features and would cost me $50 more. I just read a ridiculous amount of posts online saying their older PS3s (mainly the 60 GB which I wanted) gave out, and some of them were only a couple days old saying theirs just went out. I haven't heard of reliability problems with the slims. Plus the new one would have a DualShock 3 instead of just a SixAxis, and those controllers aren't cheap!
By the way Regis_Neo, you can easily tell if you have the 20 GB if it has no wifi (only model without), no silver trim (only model without), and backwards compatibility through the emotion engine chip. The 40 GB however doesn't have the PS2 backwards compatibility.
Oh and I found out any PS3 will play PSone games, so that was neat to hear since I have tons of those so that makes it a little less bad.