Nice. Here's my current system:
Antec 902
ASRock X58 Extreme
Intel Core i7-920 Bloomfield @ 3.2Ghz
ARCTIC COOLING Freezer 7 Pro Rev.2
HIS Radeon HD 5850 1GB @ stock
A-DATA Gaming Series 12GB DDR3 1600G
OCZ Vertex 2 120GB SSD (OS drive)
WD Caviar Blue 640GB (storage & games)
Windows 7 Home Premium 64-bit
Only thing that's not really up to par with the rest is the cooling. I'll probably get a better cooler come summertime and then hopefully be able to push the i7 to 3.6Ghz-3.8Ghz.
I am a little surprised by the fact that you're hitting 90fps on that setup. I haven't fired up Black Ops for a month or two (mainly playing BC2), but for me it would sometimes dip under 60 in certain areas. Black Ops is (was?) horribly optimized compared to both Modern Warfare games. Who knows, maybe they improved performance recently.
I plan to upgrade to a GTX 580 or future equivalent when Battlefield 3 is released, and hopefully improve my cooling as well so I can push the i7 farther.