Thanks for the advise and my serach is over. Just got done driving the ES330, Gs430, LS430 and SC430. Best of the lot was the SC430 for pure grins. I ended up with the ES330 because of some family considerations with the lack of rear seat in the SC. The Gs was faster but overall not as satisfying to me -- it seemed that there was too much road noise, etc. I also drove an Acura TL which was fast but quite noisy and not nearly as refined as the Lexus.
Really happy with the ES and will look forward to every mile.
Thanks again all :P