Had a 2000 IS and tried 412's, 416's, and finally Works. Works were absolutely the best with the ARS (I think) system which allows you several quick settings based on carrying weight. Very good stuff!!!
I now have a 97 std and have progressive 440's non HD and they are great too. I weight about 190 and my wife less than that (

) and The shocks seem plenty supple for that with no adjustment from one up riding. They are set to about the 3rd mark on the shock.
BTW +1 on the rubber strap wrench always carry 1 in my saddlebag
Hope it helps
Al
vrcc 4321