I've always liked the Olive design (stand only functioning, no fan, proper shape/size factors, iTouch/other remote options, nice little screen), now more so with the bigger HD.
The HD is $200 more to get a semi-specified DAC, more connections and they're gold plated. But you're locked into a big HD (the Olive 4 starts $500 cheaper). And frankly they (and especially the Olive 2 remote station) are overpriced based on content. You're paying a lot for pooter ignorance. Don't know about the DAC, I'll wait for the reviews.
John Casler (from AC) liked them too and used to sell them (but he says that the company was a PITA to deal with). Now I don't see links to any dealers.
The reviews of the original series liked them, but just OK. 6moons really liked them as transports. Seems to me that the original series required you to buy their expensive HD's for additional capacity/backup, it doesn't look that way now.