PS3 is'nt worth it in my opinion.  I don't really care what anyone says.  It isn't.  And I can vouch for PS2s being unreliable somewhat.  I'm on my 4th.  I keep just paying Best Buy for the 2 year plan though and have actually got money back since the 1st one.  I'll explain:  I paid $300 for the first one, and $25 for the plan.  When I went to replace it, the price had gone down, and they gave me the $100 back on a gift card.  Paid $25 for another plan.  Took that one back, $25 again.  The last time, PS2s had gone down again, so they gave me $50 back on the gift card, and I paid $20 for the new plan.
 
300+25-100+25+25-50+20 = 245
I have gotten back $55 since my first PS2.  And this one is protected until sometime mid 2007.
 
Lesson learned:  THOSE SERVICE PLANS ARE WELL WORTH THE MONEY!!!!!
Without it, I would have given up on Sony by now.  Which is why I don't care about PS3.....besides the fact Best Buy won't insure a system over $500.  At least last I checked.