Radeon HD 5770 1GB X-Fire for $100 or should i get a newer card like a HD 6790, etc...?

i have 1 Radeon HD 5770 1gb and i found another one for sale for $100 and i was thinking of getting it so that i could crossfire it but i was wondering if i would be better off just getting a totally new card, my budget is around 150$ give or take, alittle over shouldn't be a problem. basically if i can get 1 card thats better than 2 5770 1GB's then id rather go for that :)|||You can buy a GTX550Ti or an HD6850 for that, either of those is better than a pair of HD5770s and you avoid the compatibility problems that Crossfire and SLI can cause. Not only this but you can then pair up whichever one you choose later on if you wish.|||That is okay for games like DOTA, Starcraft, LOL, HON etc

If you want games like Skyrim, World of Warcraft, Call of Duty at a fast speed better than 2 5770 1GBs



then get an 2nd Gen Intel Core i7 Extreme or simply just the 2nd gen intel core i7

now thats epic..