Did you do any of the lift accessed downhills? If so, how were they.
In case it hasn't been obvious I've been thinking seriously about going to either moab or sun valley.
What I really want are 1) some great mountainous XC trails and 2) some long, epic, high adrenaline downhills (long, high spead, some short - no more that 2.5 foot - drop offs - or other opportunity to get some air - not overly huge, but a decent amount). Great scenery is also a given, though I haven't found many mountain wilderness ares that weren't scenic.
Whistler is pretty fickle with weather, and doesn't appear to have the balance of downhills and XC that I would like. This is why I started looking at moab (plus it's like a mountain biking mecca), but sun valley looks really cool too - I'm torn, and I can find way more info on Moab, so I'm eager to here as much as I can from anyone who has been to Sun Valley