Sylvania Silverstars do suck...I think one burned out at 4 months with me, and the other at 5...I was thinking about Osrams, but I've heard some good things about Luminics as well...though I haven't seen many in the P5 crowd using them. I don't want to go HID...any P5s running luminics?
Also, touching the bulb doesn't make it burn out any faster...when bulbs burn out they do so because the filament burns, which has nothing to do with finger oil on the glass. The only danger with finger oil on the glass is the glass heating and cracking or the bulb exploding, in which case the bulb is definitely going to be burned out. But if you read about bulbs burning out, very few of them explode, so I would suggest that touching or not probably doesn't make any difference.