Best all season tires at a reasonable price for an acura 09 tl sh-awd.

 

Michelin Premier A/S

I got mine for $1,030 installed at Firestone Tire.

60,000 mile warranty
Advanced Technology means that they have the same grip/braking in wet conditions from the start to the finish of their life
Smooth, quiet ride

 

I guess it depends on what your definition of reasonably priced 18" tires for a quasi-luxury sport sedan is. There are plenty of tires I could recommend to you but if your budget is $600 out the door, your options will be pretty limited.

 

As mentioned everyone's definition of reasonable will vary. However, the Conti DWS06 is my suggestion.