thanks for the comments matt
I'm not too sure to be honest, it'd be nice to find out what other people do/have done/suggest. I think the model may have only a little more detail added once the other bits are in and then it'll be textured.
Depending on how that goes I might mod it to be high poly and add in all the required extra detail including bevelling the edges etc...
Good idea with the soften/harden though, I'm using it now