OP. That looks like a very nice system HP has put out. If I were you I would take it for a test drive at the store and see what you think about it. You are in a Mac forum, so probably won't get much love when looking at a Windows based PC. As for me I have both Mac and Windows as many here do, and love Win7 and OSX as both are stable and very user friendly. I am not sure if that HP had an IPS display, but also keep that in mind on the hardware side.
I'd test drive it if I could find it anywhere? It's been a couple years since I seen local stores carry a $1900 PC. The most expensive I have seen in awhile is a loaded i7 quad tower including a 24" LCD for less than $1000. This HP is a workstation so I doubt it will be on display at bestbuy.
This HP looks nice, but it's too close in price to the iMac to consider, and I could get a nice quad i7 tower for around $600. If I'm going to be locked into an all-in-one, I'd prefer it be my platform of choice.
Props to HP for trying.