Using Omnia Pro B7610 since January. Must say, it indeed feels and works much better then my HTC TyTN II. The 3.5" AMOLED screen is absolutely gorgeous!

It comes with two modes - Life and Work Mode. I personally prefer the Work Mode as its pretty organized. With TouchWiz on, the device lags a little. You can disable TouchWiz and use SPB Mobile Shell (not free) or ThrottleLauncher (Free!) with it. Unfortunately, Samsung has still not released a WinMo 6.5 upgrade for it, even though its website says "Updateable to 6.5".
Go ahead a buy it.. Its a good device with a pretty decent camera.