This is a good tabletop gaming mini. I feel that if you want to really pizzaz him up you need to pick out the stock and clean up the metal bits a bit. Your metal looks a tad splochy, if thats a word. I agree with the previous poster that the base needs a coat of some kind of paint even if its dark grey. And on the subject of your base i think you may have put too much on it. I think that either the Space marine pack or the spikey bits would have been very cool on thier own. As it is your covering up alot of your well done mini.
A little more contrast between the model and the base would get this up to a 5 easily. Looks very washed out from the front. Simply painting the base something other than black would have helped... unfinished base = score less than 5.