Oh, I remember you; No probs.
You're happy with the sm48, but you want something else?
What kind of difference are you hoping to achieve.
If you literally just wana buy and try some mics, then fair enough.

Maybe a local studio would let you call in and test out whatever they have?
EV have a stack of mics that are great for voice work. I have 635a,pl9,re11 and re20 which are all great in their own way.
It's out of your price range, but if you're ever on for stepping up the ladder, roadtest an md421/sm7b/re20 and see how you find it.