Sorry for the delay - I thought I had already responded. Anyways, when I first installed SqueezeCenter, Squeezebox and my iMac weren't able to find each other. I tried for a while trying to fix this problem to no avail. I eventually re-installed SqueezeCenter and everything went through fine.
I love my Squeezebox/840C combo, personally. Makes accessing all my audio a breeze and the combo sounds pretty darn good. I can't wait to unpack them again.
Looking at them, the first one (the cheaper one) appears to be the old version. I'd call them to see if they (Audio Cubes) can actually get them, though, as Stax has stopped producing them.
AFAIK, the spec didn't change from old model to MkII.
I don't really care all that much anymore, especially since my browsing of HF has decreased significantly of late.
I do wish the ad was on the left side, though. I don't know why since it doesn't really make much difference with my browser automatically resizing the forums panels.