Hello All!

I am looking to by one or two video cards. I was running two Sapphire 5830s but found someone to buy them at a good price so thought I would upgrade.
I'm looking to spend $$300-$350 for what ever would give me the best bang for the dollar, whether that be a single card, or a crossfire with two cards. I am leaning towards AMD cards especially if I get a duel card setup as I think my MB is only able to crossfire and not SLI. But if a single card is more recommended then I would be ok with an NVIDIA card.
I have a 23in 1080P Samsung LED rear lit monitor. I also want to hook this up to my old CRT Projection TV which is widescreen and high def (720P/1080i). And will play games like WOW, Crysis, and, Skyrim.
My system setup right now is:
AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz Socket AM3
GIGABYTE GA-990FXA-UD3 AM3+ AMD 990FX SATA 6Gb/s USB 3.0
Seagate Barracuda ST31000524AS 1TB 7200 RPM SATA 6.0Gb/s
Microsoft Windows 7 Home Premium SP1 64-bit - OEM
CORSAIR Vengeance 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)
COOLER MASTER GX Series RS750 750W ATX12V v2.31 80 PLUS Certified Active PFC Power Supply
NZXT GAMMA Classic Series GAMA-001BK Black Steel ATX Mid Tower Computer Case (I love this case

)