I also have the i910 Omnia - and I'm due for an upgreade
Waiting for the Omnia II to come out so I can compare. I love the Dev Base that HTC devices has but that AMOLED screen on the Omina II sounded real good. Want to compare.
I've played with the Imagio at the store, it feels fast, Touch Flo was very smooth. Nice knowing the GPS is not locked. The TV looks nice. The wife works for VZW and so if I get the TV service I only pay half the price.
I went from the Tmobile MDA - Sprint Touch - VZ Omina - now looking to upgrade