Anyone here compare the Leben CS300 to the CS600?

Hello everyone,

I am in the market for a tube integrated amp. I like bass and I like tubes; not always a great combination. I have read the reviews and the posts about Leben integrated units. I have experience with the EL84 tube but the power is a bit shy. I was wondering if anyone here has heard both the CS300 and the CS600 and what their thoughts were. Also which one they would ultimately buy if they did or would.

Thanks
David