T tires are rated for 118 MPH and H tires are rated for 130 MPH. Our Contours, IIRC have a governor which prevents it from going above 115 MPH. From a safety standpoint, you are fine. Most of us regular folks seldom push it above 100 MPH (insurance). I don't think the H and T ratings make a whole lot of "comfort and better ride" difference.
The difference in ride that you feel is probably psychological but I would suggest changing it back if you feel better about the previous tires. All tires (with different tread design) will feel different initially as you are used to the previous tread design.
To quote Auto X who "autox's" during the weekends (and probably has a better "feeling" about tire performance and handling than most of us),
"Tires are not going to make a huge difference in ride. .... However, if you want a cushier ride, I'd get new struts and bushings. Yours are probably failing."
Good luck.
