I've got the facelift V70 SE Sport D5 auto. It goes like a rocket and has pop up sat nav, heated and cooled perforated leather, keyless entry/start, double glazed, folding mirrors, puddle lights, Bluetooth, an amazing sound system etc, BUT, it's not built the way a Lexus is built, and I'm not sure where it would be when it's 18 years old.
The LS is insured and taxed, so I think I'll spend some time on it as mark suggested and then make a decision. I have to introduce it to a very nice green LS in Brighton anyway!