I loved my old 4A one of my favorite cars ever, it rode pretty rough in my opinion, even more so than the couple of box sprites and MGBs I had had before, I think it is fairly inherent in the design, but I only owned one, so maybe I am wrong, I liked the motor as well, very punchy and at least mine was pretty smooth for a big four, I had a big bore kit on it and it pulled really well, I just wanted to try the same but different TR250 with IRS and the six cylinder motor. I like the ride and way it puts power down out of the corners much better, but a solid axle is much easier to rebuild and set up (basically because you probably won't have to do any of that with it over the life of the car unless something breaks). So it is certainly a trade off, but as I said life is short and I wanted to try something different.