Upgrading PC for Christmas. I want your opinions! :D

[Clyde Valentine]

First time I have ever upgraded a computer rather than just buying an outright new one so I am asking for tips on what to watch out for. I've heard of "bottle-necking" which I assume means that one piece could be holding down the computer from doing its best, that's what I am trying to prevent.

My current specs (2008-2009 technology)

GPU: GTX 260 SLI Config
CPU: I7 920
Ram: 6GB
OS: WIN7 Home Premimum
Motherboard: P6T DELUXE V2
PSU: 1000
Hard Drive: VelociRaptor 300GB 10000 RPM 16MB Cache

Upgrades

GPU: Single GTX 580
CPU: I7 2600K
Ram: Extra 2GB DDR3 '
Motherboard: P8Z68 DELUXE

I will be keeping the hard drive, and PSU as I don't see any need for them to be upgraded at this time. Thank you for your time in helping me!

[Zerokateo]

If this is for gaming I'd honestly just get an i5 2500k and the 580 is more than powerful enough so you could just get a 570 if you wanted. Also highly suggest getting an asrock z68 extreme3 gen3, great motherboards but you can get whatever you want.

[Reapaninja]

you could stick with the 920, it's still a good CPU
if you haven't already you could overclock it, instead of getting a new cpu/mobo/ram get an NH-D14