For those I've seen in person, I'd say 1625 and 2039 - both incredible bots and top notch play.
I may go to Nationals just to see 148, 67, and 207 in person - very impressive.
This team 2338 has a killer bot when their balls don't jam - which I heard that someone figured out how to fix...

Hope we get to see more of them at IRI.