Maximum PC

I have two 2 x SAPPHIRE 100297-2L Radeon HD 5830 Xtreme. But are hardly used and I may sell them and get one really good card. Based on the AMD Gigabyte MB I have that can do x16x16 should I stick with an ATI/AMD Graphics card or is it ok to go with MSI N560GTX-TI Twin Frozr II/OC GeForce GTX 560 Ti (Fermi) 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready SLI Support Video Card (Maximum PC's best of the best item).

Or should I just Crossfire what I have?

Also, after I sell my old system I can make tweaks to this one if you have any helpful ideas.

Thanks!!

My System:

1 x Seagate Barracuda ST31000524AS 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive
1 x CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ16GX3M4A1600C9
1 x ASUS DRW-24B1ST/BLK/B/AS Black SATA 24X DVD Burner - Bulk - OEM
1 x COOLER MASTER Hyper TX3 RR-910-HTX3-G1 "Heatpipe Direct Contact" 92mm CPU Cooler
1 x Microsoft Windows 7 Home Premium SP1 64-bit - OEM
1 x AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz Socket AM3 125W Six-Core Desktop Processor HDT90ZFBGRBOX
1 x GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
1 x NZXT GAMMA Classic Series GAMA-001BK Black Steel ATX Mid Tower Computer Case
2 x SAPPHIRE 100297-2L Radeon HD 5830 Xtreme 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card
1 x COOLER MASTER GX Series RS750-ACAAE3-US 750W ATX12V v2.31 SLI Ready 80 PLUS BRONZE Certified Active PFC Power Supply

The 5830s in xfire would be similar in performance to one 560ti if that helps at all.

That does help. No sense in selling the two cards I have if they will perform about the same as the better model.