It's much better than the 7770, it's a step up in the right direction, though, i'd look for a 7870 tahiti le, if it has one, or a 7950 if you can afford it, if not, well, the 7870 will give you a good gaming experience.
i cant spend much more and i don't have a choice but would i be able to max out on most games?
No, as already stated, you need a better graphics card. The rest is OK but you could do better by building it yourself. Check this out. Very similar to what you listed for about the same money with a far better graphics card plus you get all the fun and the sense of accomplishment of having built it yourself. For a little more you could select a Radeon HD 7950 or a GTX 670 graphics card and still be right around $1200.