After having a used strut fitted a couple of weeks ago the ride has gone from what I thought was good to even better. Because the guy who did it is so quick and efficient, and very familiar with the LS, it's beginning to make a lot of sense to just replace with used parts (if and when it's necessary) and keep the original setup. I think the key is to have a mechanic who is competent with Lexus but fairly priced. Thankfully with a recommendation from Neil, a fellow member, I seem to have found such a person. To remove the rear seat and replace the strut for £75 labour I thought was excellent.