I agree, we need to know some things first.
- what seems to be lacking?
- what are you looking to improve?
- what kind of budget?
IMO, the phono preamp is usually the weakest link in a turntable setup. That needs to be up to the task of handling all the nuances and micro dynamics that a good cartridge will give you. But you are not starting with crap here, either, so it's best to know what you are looking to "improve" first.