Most of my gapless albums are 16/44.1 (house, trance, live etc.). So basically with 16/44.1 it plays flawlessly on the transition with no clicks?
I also have been trying to keep up with the firmwares. I'm guessing if I purchase from Amazon it would come with the 2.1?
Well, so far all my CD rips to FLAC have sounded great. At least I haven't noticed clicks. I would also guess that 2.1 is the standard shipping firmware version. That's what mine had when I got it about 6 weeks ago.