Dodge Old Boy,
They are looking good, I like the colours on the Marines and the Cossacks. 
I tend to agree with Chris about the basing though.
Perhaps if you don't want to move away from the natural look, perhaps a ink wash over the gravel would tone it down a bit and give it some contrast or go and paint it then drybrush over the top.
Or buy some sand as suggested. But hey they are your figures go with what you feel appropriate and I would happily play a game with you using them. 
Hey Mal,
Thanks for your input,
I am seeing this as a journey,
At the start it was all about painting and the feel of my style,
In the LPL the comments were tidy the bases around the edges which I do all the time,
and now I've got to c'mon you can cahange this a bit on the base and it will look better,
so its all great advice and taken on board then they may look even better than they do now

everything anybody ever says is always taken on board and besides we all want our figs to look brilliant don't we

so next time we may have a little change
dodge