Some advice on my selected parts needed

[corsairjuly]

There are tons of these threads out here, so I'll just cut to the chase. I'm a first-time computer builder and would like some opinions on the parts I've picked out.

Mobo:
GIGABYTE GA-P55A-UD3P

Processor:
Intel Core i5-750 Lynnfield 2.66GHz

Case:
HEC 6BRBBB Black Steel ATX Mid Tower Computer Case - OEM

Power Supply:
Seventeam ST-850PAF 850W ATX 12V V2.2 SLI Ready CrossFire Ready 80 PLUS BRONZE Certified Active PFC Power Supply

Memory:
Patriot G Series ‘Sector 5' Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1333

Video Card:
XFX HD-577A-ZNFC Radeon HD 5770 (Juniper XT) 1GB 128-bit GDDR5

Hard Drive:
Western Digital Caviar Black WD1001FALS 1TB 7200 RPM

Optical Drive:
Sony Optiarc Black

Monitor:
SAMSUNG 2494SW Glossy Black 24" 5ms Widescreen LCD Monitor

OS:
W7 HP



Also, a few quick questions:

1. Would these parts provide good upgradability?
2. In terms of price versus performance, is this a good selection of parts?
3. I'll most likely be using wireless internet, so do I need some sort of adapter for that?

Thanks in advance for the help, guys! I really appreciate it.

 

[Whirlwind]

You can get a better quality power supply than that.....look at a corsair power supply, if there is one in your price range.

I have that monitor you list and it is great.

 

[farinha]

Since you're not going to run two gpus this psu is enough: Newegg.com - CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Power Supplies

Or you can get this combo and this mobo will run two gpus, good for future upgrades: Newegg.com - Computer Parts, PC Components, Laptop Computers, Digital Cameras and more!

In that case get this PSU: Newegg.com - CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply - Power Supplies

 

[Slaymate]

This is a nice case and power supply combo you might like instead. It's a better deal all the way around. The Cooler Master case will be sturdier/better built, and it's stylish. The power supply is more than adaquate for your parts plus it's modular and OCZ is a very reputable company that stands behind their parts. And to top it off the price is the same plus there's an additional $25 mail-in-rebate
Newegg.com - Computer Parts, PC Components, Laptop Computers, Digital Cameras and more!

 

[corsairjuly]

Or you can get this combo and this mobo will run two gpus, good for future upgrades: Newegg.com - Computer Parts, PC Components, Laptop Computers, Digital Cameras and more!

I'm looking to build a system with room for future upgrades, so I swapped it out for the above combo that you recommended. Thanks!

I'm trying to keep costs as low as possible. Right now, my build stands at $1,302. Is a better power supply really necessary?

 

[baron5]

also change that ram, patriot ram is fiddly in my experience, not good for overclocking at all.
much better set
Newegg.com - G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-4GBRL - Desktop Memory
faster as well.

everything else seems good.