first, 300 = bentley
caddys are ballin, as soon as i saw it on your list, i knew it would be a choice in the end.
magnums are sweet but since they have massive wheels, they eat tie rod ends. also, if you end up with brembos, they eat those suckers too and are rather $$$ and also tend to develop p/s leaks for the obvious
best of luck in the choice though, both are very nice