Where is the pistol falling short currently? What isn't it doing that you want it to? If there isn't really anything wrong with your SR9c why put money into fixing it? Buy ammo instead.
I have several compact and subcompact plastic pistols and they are what they are. I have never considered putting money into any of them. They either suit my purpose or they don't. Having a gun smith trick out your SR9c is probably going to cost you more than you originally paid for the pistol. You would probably be better off using the money too purchase a different pistol if the SR9c isn't suitable for your purposes.
If you want a pistol to trick out you would be much better off with a Glock, Sig 320 or CZ that have tons of after market upgrades that you can install yourself. There just isn't much aftermarket support for the SR9c and a good gunsmith isn't going to be cheap.
I have a couple of tricked out 1911's that I bought from friends. When they wanted to trade them in at the gun shop, gun show or used car dealer I told them I would match what ever they could get for them. All the smithing and work they had done on them didn't mean anything when trading them in or selling them. They were simply used 1911's and valued as such. You could easily have a $500, $600 or more SR9c that isn't appreciably different than what you have now.
