Quoted from navajas:http://pinballbulbs.com/
Best on the market.
About 10-15% of the bulbs I ordered from Pinball Life fell apart in my hands. They're a fine company, but I won't buy bulbs from them ever again.
Pinballbulbs.com is my current preference as well. I generally don't go overboard but really favor frosted cool white for the GI. Also with their product you can easily pop the domes off is you just want a typical flat "super bright" for under an insert for example.