Can't really comment on the Falkens except for when I bought them back in '89 to replace the Goodyear Gatorbacks on Lori's '87 Thunderchicken Turbo Coupe. They were stiffer than the Gators back then, I'm sure they have come a long way since then.
If you're looking at size 225/45/17's, then I would seriously consider the Pirelli P Zero Nero's here...http://www.tirerack.com/tires/tires....omCompare1=yes
They have excellent reviews, and on other boards, the people who have chosen these Pirelli have nothing but good things to say about them. I was even considering them for replacements for the M5. If they made them in 225/55/16's, they would be on the E39 for sure. But for now, we have to wear out the new Conti's that came on it.
Hope you have a prosperous New Year....
Jr