I'm going to say it: Boss TR-2. Stock, it's a friggin' awesome pedal. With the Keeley Mod, I'm sure it only gets better. It does the vintage stuff really well, and I was being stupid the other night and dialed in a close Green Day sound.
Save time and hassle and buy an Empress Tremolo. It's a little high but well worth it. I bought one based only on online reviews and have never looked back.