It basically comes out to be around the same price. I just wondered what you guys would recommend. Would 6 cores be worth it for future proofing and maybe if I decided to do a little bit more in the future?
What graphics cards are you using? Cosidering its "light gaming" your not looking at anything above a 5870 are you?
This you are not really gaming (depending on your card) you don't need the i5. The i5 will outperform the Phenoms in games though this only happens when the CPU is the bottleneck, which happens when you go above about a 5870.
The X6 will have a large advantage in ripping (what are you doing? DVDs to x264 with handbrake?) over the i5. The X6 is the better choice if your not getting some really specced up graphics cards.
The 890GX is only needed for Crossfire, if you intend to crossfire then it is fine though otherwise it is a waste. Even if you think there is a chance of CFing then getting the 880G will still probably be better, you will lose a bit of performance going with the 880G when CFing though it is not too large.
Nah you will see a bit of a performance drop from 2 5770s in x16/x4 CF. You could though save up the money now and run just a single 6870 or something and then save the extra on the motherboard. Though then you might want to CF the 6870 in the future so it doesn't really help .
Just get your current config, since your only getting 5770 CF the Phenom will be fine and won't limit them.
So in conclusion, I think the best idea is to get the X6 with your current motherboard.