No need for a new GPU yet, pretty sure my current GPU is being held back by my CPU.
AMD Phenom II X6 1055T @ 2.8GHz
If your motherboard is AM3+ you could just get an FX-8350, cheaper and easier than a full rebuild. It's rated the same wattage as your 1055T so you wouldn't even have to worry about a new PSU. You should gain a noticeable improvement.
off topic (since Kruppsy doesn't check PMs) RE 6 tonight?
All I'll be using it for is mainly high end gaming and usual surfing of the web etc.
Is a 4770 needed for that, or are they mainly bought for video rendering/photoshop use?