Glenn,
I am the proud owner of a mk2 vertex v300 and it rocks! the stock 0-60 is 6.5, but as many of the chaps on here will tell you, the 2jz-gte engine is one of the most tuneable arround. One of the chaps on here is about to stick this engine into an IS and 700bhp is the target!
Before buying this, I had a uk gs300 sport, loved it, but lacked the "power". It goes like stink and is a real headturner - the only thing i miss is heated seats! The gs430 was vapourware when i bought the v300, but then again the 430 is quite a lot more cash.
Shame you couldnt hold out a few weeks as I am looking to buy an LS430 or S430 and you could buy mine! - 33,000 miles Black, with blacked windows (tinted - not film!), touch screen tv and UK sat nav - 18' wheels (10 inch wide on rears)
Rik