M-ATX Budget Gaming Build

[Proc]

Looking at building myself a new gaming pc and wanting to go the sff route. I've got a budget of around £500, I'm after a system that would be able to run the current crop of big games as well as some future proofing. This is what I'm come up with but welcome any changes or suggestions, my concern is would that gfx card fit in that case and what would be a decent psu for it?

1x Sapphire Radeon R9 270X Boost OC 4096MB GDDR5 PCI-Express Card
1x Xenon H81M Configurable Intel Pentium / Core i3 / i5 Micro ATX Home PC Bundle (i5 4440, stock cooler & 8gb 1600 ram)
1x BitFenix Phenom MATX Cube Case - Midnight Black

 

[Proc]

Got a hd & os, budget is around £500 but can be a little over if needs be as I know adding a psu will put it over. Are there any cheaper gfx cards that are good performance/price balance?

 

[Proc]

That looks like a good system, cheers for that.