An accutrigger will not fit on it so that narrows down your decision somewhat, but the SSS trigger is much better than that anyway. You wont be disappointed in it thats for sure.

For a carry gun a Timney or Riflebasix Sav-1 are good triggers to look at also.

All 3 are about the same price.

As far as the gun being plain, theres lots you can do yourself to fix that. A new stock can make itlook entirely different.