That's around £575. Moving up to an FX-83xx processor will cost another £30-£50, and may be considered, but you likely don't really need the extra jam in the big scheme of things. Save the extra cash for a future CPU upgrade.
With that water and 95w CPU, it should be really simple to OC that Piledriver will little effort
If you give me a few hints I would be happy to recommend one. I prefer simple designs with good air flow and venting, but I suspect you may want a cabinet with a little more bling than I would normally consider.