P35 vs P45?

I am trying to find some answers regarding a new motherboard. I have spent hours trying to figure out which board to get and still am no closer to making a decision since I am having trouble finding answers. I am looking to make a new computer that will be used mostly for internet, video editing, photoshop, and games. My old A8N so I need some new parts.

I have it down to either the Gigabyte GA-EP35-DS3L or the ASUS P5Q Pro (or perhaps the GIGABYTE P45 upgrade, but I have not seen any reviews on it yet). I mostly just need to know if a P35 board will be enough or is it a good idea to go for a P45 board so it will last longer. Will I see any actual performance gain using the newer board? Will I ever use the benefits of the new board (i.e. PCI-E 2.0) or will it only matter for higher end users?

Here is what I have planned so far:

Intel C2D E8400

OCZ 2 x 2GB DDR21000 RAM (would G.Skill be be better?)

Antec TruePower 2.0 550W PSU

MSI GeForce 8800GT 512

2 x IDE DVD burners

2 x SATA HD

Coolermaster Centurion 5 (will this supply enough airflow if I plan to OC or should I look into a new case as well?)

Thanks for any suggestion!

The P45 mobos that only have one PCIe 2.0 slot are only like 10-30 dollars more than the newer p35s....might as well pick up a P45 considering it is technically the next step up from a P35 mobo.

Correct me if I am wrong but in theory shouldn't 2 PCIe 2.0 slots running 8x/8x crossfire be just as good as 2 PCIe 1.1 slots running 16x/16x crossfire?

I already had an 8800GT from my old computer. i am thinking of getting an intel board because ATI seems to be getting stronger again, while when I got the old computer, Nvidia seemed to be on top. If I upgrade my video card down the road, I would probably go for an ATI card, which is why I am thinking P45 (or I guess X48).

The P45 mobos that only have one PCIe 2.0 slot are only like 10-30 dollars more than the newer p35s....might as well pick up a P45 considering it is technically the next step up from a P35 mobo.

Correct me if I am wrong but in theory shouldn't 2 PCIe 2.0 slots running 8x/8x crossfire be just as good as 2 PCIe 1.1 slots running 16x/16x crossfire?

UnknownSniper65