No one can really be sick of The Nexus Prime (Samsung Galaxy Nexus?)... Ice Cream Sandwich is brand-smacking-new and has undergone a major rework under-the-hood.

It also has awesome features, it'll be a phone that wont be beaten in the next 6 months and will probably last for over 2 years.

The N9, I'm not so sure of. It has no support. Not really a community either. If you decide to get it, in 6-8months there's a high probability you'll feel "left behind"