The only benefit you'd get getting another DGT is then you'll be able to say you "have two DGT's." Just stick with the one, but if you are in the mood for a Strat type then at least play a Silver Sky AND some of the new Fenders just so you'll know.
I personally did not get on with the Silver Sky, and prefer my other guitars that are similar mostly for the feel, but some of it for the sound.