I've had an Samsung Omnia 7 since mid-November on 3, I'm delighted with the phone, I was one of the original UK guys who queued for an iPhone on launch, then went to a iPhone 3G, I just fancied a change and it was cheaper to get the Omnia 7 than an iPhone 4 & I have no regrets. And the Zune software I feel is far better than buggy iTunes. I tried a few Android phones as well, did like them but I felt the Windows 7 Phone's Metro was easier to navigate around. Saying that, I'll give andriod another go when my contact is up next November to see if it's got better.
Saying that, the wife's Palm Pre's OS is fantastic as well, but stuck with flimsy and outdated hardware in my opinion. Web OS running on the Omnia 7's form factor with the AMOLED screen would be pretty cool.