How do you like the sound?
If you are happy with it, keep it.
If you want more detail, better tracking, and a smoother treble, a better cartridge can give you that.
The simplest route may be to buy a better stylus for the AT-95E.
LPGear has several options. Scroll down this page to see them listed on the left.
Several people here have recommended the VL stylus. I think the SE stylus might not make enough difference to be worth buying unless you NEED a new stylus because yours is worn out.http://www.lpgear.com/product/ATSAT0095E.html