I've got the Sony SXRD KDS60A2000, and the bulb just went out... It's been 4 years and 7 months (7 months outside of my 4 year extended warranty)

Trying to figure out what to do...
1) Buy a bulb? If I decide to do this, where's the best place to buy, and what brand should I be buying (Osram, Philips, Aftermarket, etc...). Also, do I go bare bulb and install it in the housing myself, or go with the preinstalled in the housing?
2) Get a new television set? Is there such a thing as a "good" SXRD, or are all of the units a ticking time bomb for optical block and/or green blob type issues? If it's an eventuality, then perhaps I should just suck it up and get a new set.
3) A question really... How does this Sony trade-in program work for people experiencing the Optical Block issue? What are the eligibility requirements? How do they recover your old set (or do they)? Is there anyway I can make this program work for me?
Thanks everyone!