Roulette All On Red
This one is quickly becoming one of my favorites. I can barely hear it through my comforter when it's maxed out. And it's pretty powerful at that point- not earthshaking, but above average. It's a little girthier than some, so be sure to read up on it if that's an issue, but it's worth checking out.
(You'd probably be wise to avoid the rabbit/dual stimulation Evolved vibes. It's a bummer as they make some very nice ones and they're on sale, but the dual stim ones tend to rattle.)
That's all I can think of at the moment, but I'll keep the question in mind.