Advice on my existing build...?

[Stains]

I have always been into computers and wanted to give my own build a go summer of last year. I had a little stash of money to give it a bash so I done a bit of research and what have you and went for it. Thing is, reading various threads on here has made me wonder if 1) I found this place too late, and 2) Am I bottle necking my system or is there any major flaws in it that with a few tweaks I could improve it...? Obviously any system can be improved but I hope you get the jist of what i'm saying. As I said, this was my first attempt, so go easy...

What I ended up going for;
MB - Asus Crosshair III Formula 790FX
AMD Phenom II X4 Quad 955 Core 3.2GHz Processor
Radeon HD5450 1GB
4 x 2GB Corsair XMS3 DDR3 Memory
Samsung F3 HD103SJ 1TB HDD
Samsung SH-S223L Internal 22x DVD Writer Drive

Running Windows 7 64-Bit.

Very basic graphics card I know but I only really play Footy Manager although eventually want to be playing HD Media through here and that is capable, how well, I know not. Maybe a bit of feedback on that too.

Basically, i'm here to learn or find out where to learn more about all this. Any help would be appreciated.

Stains

 

[Stains]

Cheers for your response. To be honest, I was running out of money on the build and decided to scrimp on the GPU with the plan of saving up for one. I done the first part, but not the second. I shall look into your recommendation though.

My PSU - OCZ ModXStream-Pro 700w. It was on offer at the time and I thought it would leave me a bit of room for expansion... Is that right?

 

[Stains]

Just to confirm. What exactly do you do with the computer? Is football manager the only game you play... or plan on playing?

What is the resolution of your monitor?

P.S. Your PSU is fine!

Samsung Syncmaster B2230H 21.5" Widescreen. Full HD. I'd like to end up running a Blu-Ray optical drive which is why I ask about the GPU. I'm also just getting into Photography and learning the basics for CS5 aswell. When I said "only Footy manager" I didn't mean that's all I do, but that tends to be the only game as I play COD and FIFA etc on the 360. Browsing/Basic
editing/FM/Movies etc.