On which player(s) does Rockboy work at full speed / without lag?

[NathanV]

I've tried Rockboy on both a Sansa Clip Zip and a Fuze and they both run with significant lag even with frameskip and sound disabled. I know this is because the processor is too slow. My question is which players that support Rockbox are fast enough to run Rockboy with no lag?  Are there any in the Sansa/Sandisk line?

Thanks.

[Eldus]

My fuse V2 runs fairly well with rockboy.