You know, I'm using the 304 as a pre-amp now. After a few months with my Triangles, I am hearing the 304's limitations... namely rolled off extreme highs and lows. Shortly after writing this, I spent some serious listening time with the Parasound amp and realized that it was pretty great, if a little "hard" sounding in my system.
I'm curious about the 315Bee and the 325Bee as well. I assumed they would be only marginal improvements, but a remote control would be awesome.
I'm curious about the B&K ST-140 (the older, 70WPC one), the ST-120, and the newest Parasound Zamp. I've also heard some great things about the Onkyo A9555 Class D integrated.
Finally, I take no offense at anyone's opinions about the 304 (or any of my gear) for that matter. Taste is taste, and good is good. Cheers!