I have the Motorsport springs now with stock struts. I am happy with the ride quality, but the car is slightly too low to get in and out of my driveway. The tow hooks scrape a little bit. I have had these springs since November, but have only put about 2000 miles on my car since then.
On my 1995 SVX, I had the K&B springs. I have a lot more experience with these as I ran them on my car for 70,000 miles with the stock struts. I had no issues and the struts held up fine. The car rode and handled great. I believe they are the best option for the SVX.