A buddy has these are choices for a company car in Europe, and has no clue, so he asked my help - what do you guys think?

Alfa Romeo 156 2.5 V6 (193 hp)
Audi A4 2.4 V6
BMW 320d (150 hp diesel)
Lexus IS 200 (155 hp inline six)

What would you guys choose? I've driven a 320d four years ago, and wasn't very impressed - redline is like 4500 rpm, it was slow and the car is just not that sporty. I think the engine has improved since then though.
The Alfa would be the fastest by far, and the V6 sounds sweet, but I drove a 156 once and the brakes, shifter and stuff all kinda suck. IS200 would be the sportiest, but kinda slow (0-60 in 9 sec). I think I'd choose the Alfa or the IS200.