Advice on new build

[alando mixwell]

Current rig:

Motherboard - Asus P5WD2
CPU - Intel Pentium 4 531 3.0 GHz
GPU - BFG Nvidia 7800 GT OC
RAM - 2GB Corsair DDR2-533 DDR2 SDRAM
HDDs - WD250KS, WD320KS, WD500KS, WD250PB
DVD-ROM - Sony DDU1615
DVD-RW - Pioneer DVR-110D
PSU - SilverStone 500w ST50EF-PLUS
Monitor - Samsung SyncMaster 225BW

Up until now I have been happy with the performance with my first build. However, lately I've noticed my computer running pretty sluggish when it comes to resource intensive programs. And when I watch anime, most of the 720p encodes play fine, but playing anything 1080p it starts stuttering and skipping frames. As a result I feel the need to build a whole new system. From doing some research here are the components I decided on:

Motherboard - ASUS P5K DELUXE
CPU - Intel Core 2 Quad Q6600 Kentsfield
GPU - XFX GeForce 8800GT
RAM - G.SKILL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 4GB total

Couple questions concerning my new build.
Is my current PSU good enough or should I get something more powerful. I might add another 500GB hard drive really soon because I'm running out of room. I'm really undecided on the motherboard, the only reason I chose the Asus is because my current board is an Asus and I have had no problems with it. However, reading the reviews from newegg it seems that the P5K Deluxe has its share of problems like not recognizing the Q6600 without flashing the bios. The ABIT IP35 Pro looks like a really good alternative. Another thing of concern is that I'm planning to overclock the Q66oo to 3.0GHz. I have never overclocked and was wondering if the stock fan will provide sufficient cooling. All I'm looking for is a motherboard that is stable and easy to overclock.
I currently use my computer for web browsing, graphic design, coding, listening to music, watching multimedia (mostly anime), some work in MS Office, and gaming (mostly FPS like BF2 and CS). I'm pretty sure the Q6600 can handle having photoshop, illustrator, and firefox open at the same time and then some, unlike my current system . Right now I'm in love with my 22 inch widescreen but sooner or later I might move up to a 24 or maybe even a 30 inch and I'm hoping the 8800GT will handle the higher resolutions.
All comments and recommendations will be greatly appreciated .

 

[silent-circuit]

I'd recommend an 8800 GTS 512MB ($300-330) over the GT if you may get a 24" LCD soon. You might also consider watching the forums here for a deal on a used 8800 GTX. If you pick up a Crossfire board you could get a Radeon HD 3870 and pick up a second card when you get the 24" LCD.

Pick up a Scythe Ninja HSF ($40). Should get the Q6600 up to 3.2-3.4, maybe more, without issue.

Sell your current DDR2 and buy a 4GB kit -- the DDR2-533 will not be enough when OCing. You can get a nice CAS5 4GB (2x2GB sticks) kit for around $70 AR ($20 MIR) right now. There's an OCZ kit and a GEIL kit for that price on NewEgg right now.

Buy the Q6600 via ClubIT.com so you're sure you get the G0 stepping chip. It runs cooler and OCs higher than the older B3

What do you like about the P5K Deluxe? Or the IP35-Pro for that matter? Will you actually make use of the extra features? Do you need firewire? Legacy ports? If not, you can save a good bit on the motherboard. Check out the Abit IP35-E, Gigabyte GA-P35-DS3L and DS3R, and the DFI Blood Iron P35-TR2L and DFI P35 Dark.