I could not stand the lacking quality of OE tires (Eagle RS-A) So after I bought my car, I sold off my OE (40 miles on them) and bought a new set of tires. I ended with Bridgestone Turenza Serenity Plus and could not be happier.
There is a huge difference between Ultra High Performance and GT(grand touring) All season tires with 19 rims. You are trading off nimble and aggressive traction for a far better ride and sound characteristic. Since I have AWD I figured I was not losing much.
What I was after, that OE tires did not supply, was a smooth/quiet ride with solid all-season traction without changing to 17 or 18 rims. I was told that was impossible with AWD car however those bloggers were wrong. My stock size was 245/40 r19 so I went with a plus 0 size, 255/40 R19 to gain better ride. I gained maybe 7mm of sidewall and whammo it worked.
First off 255/40 R 19 recommended rim size was 8.5 to 10 and my stock rims were 19x8. I checked with numerous resources and posts/discussions of people that did the same thing, what I found was that it was fine.
Initially I tried Continentals DWS 245/40 R19 (was no 255/40 option) and loved their traction. Yet the ride was too sporty, granted they were far better than OE tires. Then I was talked into Michelin Pilot Sport A/S Plus in 255/40 R 19 (Ultra High Perf All season) - Traction and control were great however the tires were noisy & ride quality was not quite what I wanted.
So I then tried Bridgestone Turanza Serenity Plus (Grand Touring All-Season) in 255/40 R 19. Talk about night and day, these tires have solid dry, wet and snow traction with unbelievable silent/silky smooth ride. My wife could not believe it. She said, I felt like I was driving a totally different model of TL! Seriously, I highly recommend these tires.
Sidenote: 2013 Acura TL SH-AWD Advanced package - If you want a far smoother ride, change your stock 245/40 R19 tires to these Bridgestones in 255/40 r19. Trust me, pure silky awesomeness.