I'm coming back into this because I see the GTX295 is a possibility... just to share some results.
_____________FRAMEBUFFER- CRYSIS WARHEAD_____________________
Processor: Intel(R) Core(TM) i7 CPU 920 @ 2.67GHz @ 3997 Mhz
CPU ID: Intel64 Family 6 Model 26 Stepping 4
Operating System: Microsoft® Windows Vista™ Ultimate 64-bit Service Pack 1
Physical memory: 6.00 GB
Display adapter: NVIDIA GeForce GTX 295 0 MB
Video Processor: NVxx
Overclocked: Yes / Multi-GPU: No (2)
Driver version: 7.15.11.8206 (20090209171800.000000-000)
GPU clocks: 701/1512/1147
Motherboard: DFI DFI LP UT X58 1.0
==============================================================
TimeDemo Play Started , (Total Frames: 1882, Recorded Time: 56.90s)
!TimeDemo Run 0 Finished.
Play Time: 46.12s, Average FPS: 40.81
Min FPS: 31.69 at frame 1642, Max FPS: 49.96 at frame 1519
Average Tri/Sec: 24126938, Tri/Frame: 591222
Recorded/Played Tris ratio: -0.32
!TimeDemo Run 1 Finished.
Play Time: 44.72s, Average FPS: 42.08
Min FPS: 31.69 at frame 1642, Max FPS: 49.96 at frame 1519
Average Tri/Sec: 24803490, Tri/Frame: 589391
Recorded/Played Tris ratio: -0.32
!TimeDemo Run 2 Finished.
Play Time: 44.36s, Average FPS: 42.43
Min FPS: 31.69 at frame 1642, Max FPS: 50.96 at frame 1570
Average Tri/Sec: 24826268, Tri/Frame: 585150
Recorded/Played Tris ratio: -0.32
TimeDemo Play Ended, (3 Runs Performed)
==============================================================
//////////// Summary \\\\\\\\\\\\\
03/25/2009 04:42:13 - Microsoft® Windows Vista™ Ultimate 64-bit Service Pack 1
DirectX 10 ENTHUSIAST 3X @ Map: frost @ 0 1920 x 1080 AA 2x
==> Framerate [ Min: 31.69 Max: 50.46 Avg: 42.26 ]
=====> Validation code: 81-D0-F4-5E-5F-45-E9-10-9A-D3-FD-AC-02-79-E3-EA
::EDIT::
OLD RESULTS with 4870x2 and E8600 @ 4.4GHz 1280x1024 NO AA Map: Airfield Flythrough.
Processor: Intel(R) Core(TM)2 Duo CPU E8600 @ 3.33GHz @ 4441 Mhz
CPU ID: Intel64 Family 6 Model 23 Stepping 10
Operating System: Microsoft® Windows Vista™ Ultimate 64-bit Service Pack 1
Physical memory: 4.00 GB
Display adapter: ATI Radeon HD 4870 X2 1024 MB
Driver version: Catalyst 8.10 (8.541-080923a-069997C-ATI)
==============================================================
TimeDemo Play Started , (Total Frames: 2000, Recorded Time: 85.82s)
!TimeDemo Run 0 Finished.
Play Time: 41.09s, Average FPS: 48.68
Min FPS: 34.76 at frame 95, Max FPS: 62.72 at frame 1407
Average Tri/Sec: -49226368, Tri/Frame: -1011245
Recorded/Played Tris ratio: 0.97
!TimeDemo Run 1 Finished.
Play Time: 38.47s, Average FPS: 51.99
Min FPS: 34.76 at frame 95, Max FPS: 64.77 at frame 1987
Average Tri/Sec: -51027272, Tri/Frame: -981506
Recorded/Played Tris ratio: 1.00
!TimeDemo Run 2 Finished.
Play Time: 38.10s, Average FPS: 52.49
Min FPS: 34.76 at frame 95, Max FPS: 65.49 at frame 1995
Average Tri/Sec: -52311228, Tri/Frame: -996586
Recorded/Played Tris ratio: 0.99
TimeDemo Play Ended, (3 Runs Performed)
==============================================================
//////////// Summary \\\\\\\\\\\\\
10/15/2008 19:51:56 - Microsoft® Windows Vista™ Ultimate 64-bit Service Pack 1
DirectX 10 ENTHUSIAST 3X @ Map: airfield flythrough @ 8 1280 x 1024 AA 0xx
==> Framerate [ Min: 34.76 Max: 65.13 Avg: 52.24 ]
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If you ask me the airfield flythrough is the easiest of all the maps. There's no action... no explosions... just flying around an airfield. Still the 4870x2 had problems with this map getting over 40fps... if I take AA off and lower the resolution to this with the 295 the results aren't pretty to compare.