@musiclover1 and charles1dad: My concerns as to whether the R300 would match well with my JM Reynaud Offrande Supreme v.1 speakers turned out to groundless. What I'm hearing is a warm, palpable presentation with no sense of fatigue whatsoever. Keep in mind that I'm in a small apartment which dictates lower listening levels. Still, I'm getting tight, punchy bass, a warmish enveloping midrange and crisp highs. I'm sure the transformers in the R300 aren't the best available but I suspect their quality is higher than one might expect at this price. I prefer this amp to the First Watt M2x amp it replaced.
Also, I'm using the R300 as a power amp only. While it sounds great as an integrated, I have a Cary SLP-05 preamp that's just too good not to use. The combination is amazing. My first 300B purchase has worked out very, very well.