I've never even seen a case of YLOD before tbh on a PS3, whereas even though I've got a 360 myself I've seen lots of RROD cases. If you want reliability, honestly, get it repaired/get another PS3.
my ps3 has had the ylod about 5/6 times, and i just gave up repairing it. I had the original 60gb model, and i bought it second hand so that may be a reason? But it sounds like the 80gb and slim versions don't get the ylod. Hopefully getting a new one for xmas