I plan on building a new rig in August, and plan on spending around $1000 for upgrades.
my current rig is
Antec 900 case
Asus p5k3 deluxe mobo
intel quad q6600
EVGA 275 gtx
4 gb of 1333 xms3 DDR3 Ram
Fatility pro sound card
800 watt power supply
on a 1680x1050 monitor
The new rig I want to build
use the Antec 900 case
evga p67 motherboard - not sure which one yet
8 or 16gb of xms3 ddr3 ram
keep my fatility pro sound card
keep the 800 watt power supply
debating on buying a 1080p monitor due to the power the 580 can provide.
My main concern is. Does this rig seem future proof for at least 2 years to play games max settings?
Anything I might want to change?
I'd say you'd be okay at max settings for 1-2 years. Consoles have been holding PC games back for some time now. So when that bubble burst is anyone's guess. I think 16 GB of RAM is overkill for gaming though. Also I would look into a case that would offer you an easier time with cable management.
Skaz is absolutely correct about the RAM overkill. In fact, you don't need more than the 4 GB you have. You will never see a tangible benefit in gaming from having more than 4GB (at least not in the 2 years you have scheduled out).
In fact, I'd go so far to say that your GTX 275 will run most games quite well at max settings for the next 2 years. Especially if you keep the current monitor. If you do upgrade to 1080 based monitor, then a card upgrade will help with AA at max settings and the resolution (GTX 275 having just 896 MB of RAM will hold it back at the higher resolution).
Don't waste money on the i7 2600k since games do not take advantage of Hyper Threading. If you are gonna encode video then that's different. The exception is Resident Evil 5 which seems to get about a 10% performance boost with Hyper Threading. But that's just one game.
8GB of RAM should be more than enough. 16GB is good if you are working with large databases or programs like PhotoShop.