Hi Nick,
This is indees a nice render, but like remus already have pointed out, the lightning could use some "love"...
I suggest that you try converting the spotlights to IES lights...
If you don't know the process for this, please check out the Converting spot to IES lights thread...
The process may seem a bit intricate, but once you've tried it a couple of times, it's really not that difficult...
The lights in the bathroom scenes I've rendered in the rendered bathrooms thread are all IES lights...