Krell KSA 300S or FPB 300?

I have to share my experience although there is a lot of good response to this I have lived owned the KSA-250, 300S and FPB 300. My first Krell amp was the 250 and I loved it but then thought newer was even better. I sold the 250 and bought the KSA-200S only to have lost the major bass slam that I loved from the 250. After talking with krell, they said that was because of the transformer size and I should have got the 300S. I then sold the 200S only and bought the 300S and was rejoicing once again. The 300S was much cleaner from mids and into the upper frequencies, that was my impression and that the 250 was a bit "grainier". I loved that for a few years and started thinking "what if" and decided to buy the FPB300 but had to sell the 300S first to afford it. I did that and got the FPB300 and although it was even more refined sounding I felt it lost the "amplified" sound for rock/metal and was really sorry I sold the 300S. I tried to live with it but just couldn't and sold it only to buy my current 300S that I am living happily ever after. The bottom line is that I found my “cup of tea” for my liking and won’t part with it now. Obviously try to audition before you buy but the good thing is the resale on most Krell is not that bad. My system is Krell AVS, DT10, B&W 802N with all Purist Audio Venustas cables.