Latest issue of Motor Trent arrived today. They have a Infiniti M45 vs Lexus GS430. Both very, very nice. In case you haven't read it yet, I won't spoil it by telling you their choice... Either MT or C&D will eventually have a M45/GS430/545 shootout.
But - I think the M45 is quite interesting: 0-60 in 5.7sec, base price in mid-40s (49.5 for M45/Sport), 335hp, lots of technology - and it all should work too! Doesn't look too bad IMO.
They also have an article on the Mustang GT500. That should be very interesting as well: priced in the 40s with 450hp! Not too shabby!

Spring of '06 as a '07 model.