Its about time they did this upgrade, however I havent had a chance to test the audio bitrates, last time I checked sky digital music, all were at 32,000Khz 192kbps, hopefully i'll test again and find it at 48,000Khz, the same as the audio on all their tv channels.
The resolution used on most channels previously was 544x576 producing shocking quality, pictures were slightly blurred with more pixilated squares during high motion. even C4 was at 544x576 while the freeview feed was 720x576, all freeview channels are 720x576 by the way.
The reason I use a dreambox is I want to record but dont want the constant hum of the mysky hdd in my bedroom while im trying to sleep, hence the dreambox. the dreambox uses a laptop hdd, more quiet, it also powers down when not in use. When I initially scanned all the channels in my dreambox, I deleted skys poor quality feed of C4 and kept the freeview feed, did the same with tv1, 2 and 3. the bitrates on the sky feeds are also lower. Before I had my dreambox I used to sometimes switch to analogue for C4 as it was slightly better quality than skys 544x576 pixilated feed of C4, we have a direct line of site to waiatarua too with VHF/UHF roof antennas so no ghosting or fuzzyness, just a clear picture.