Boca bearings are probably the best bearings in the business. They last a very very long time. I personally use green seals in everything, they are VERY smooth, yet there is a little resistance, but id rather that than them blowing up. However I run nitro buggy and will be running electric TC on pavement.
OOMSGFX.COM (no longer painting, but take a look for fun!), Roadrunners RC Club
"Racing drivers have balls, unfortunately, none of them are crystal" (David Coulthard)
"I believe the average IQ of a NASCAR fan is only marginally above the things that hit the windscreen during the race. "