I've only tried the stock S197 shifter with the TR-3650. I don't have any complaints and I don't see any need to buy an aftermarket shifter at this point. YMMV.
For once I agree with you. The stock shifter in my 07 is very nice. I can powershift 3rd all day long and never miss a beat. I see no reason to change it.
I work for PRO 5.0 I have taken all of the shifters apart that are currently on the market. I have measured their tolerances, looked at their materials and tested all of them on the street and on the track at raceway park. Past years and the 05 car and the 07 car. I am willing to give an honest unbiast opinion. The Steeda shifter is a Great quality shifter and it is better than the Hurst although I do respect Hurst for their accomplishments. Hurst is now owned by B&M by the way. The guys on here pushing the MGW shifter must work for MGW because they have always made a lower quality product for a cheaper price. Go for the Steeda ( or the Pro5.0 )