All aftermarket shifters will resonate some of the transmission noise because they eliminate all of the rubber. If it is more important to have a quiet shifter than one that greatly improves the shifting of the car, you should probably consider staying with the stock one.
I'm not much for these kind of replies, but if you search Hurst or shifters you will get loads of info. I've been reading plenty about shifters lately here and other sites. I have a Hurst and I like it, but I don't race much. If you plan on a lot of abuse then consider a billet type with stops.