I would stick with what you already got too. Those cards are still epic. My rig is new so I figured I go with whats current. If I had the money I would have gotten at lest one 7970, then waited for them to drop in price and get another to crossfire, but the lone 7770 is running like a champ. Most likely what i'd do is get another 7770 run that in crossfire until the next gen cards come out, and get a 8970 lol, then again I do wanna make another build so the 7770's would still have a home lol.

Not to bad for a lab top. Bet she gets hot.

Intel i5-3570K 3.4ghz, Turbo OC'd to 4.0ghz
COOLER MASTER Hyper 212 EVO Heatsink for the i5k
GIGABYTE GA-Z77X-UD5H Motherboard
CORSAIR Vengeance Ram 8GB (2 x 4GB)
HIS IceQ X 7770 Graphics card
30gb SDD ADATA mSATA II for Intel Smart Response
2.5Tb (one 1Tb, and one 1.5TB Seagate Barracuda)
Antec High Current Gamer Series 750W
The OS is 7 Pro. 64-bit
And all cased in a NZXT Phantom Black