The forum doesn't have enough users in any one area (even Chicago) to do well with recommendations like that. You'd do better with Angies List (maybe) or by calling the nearest SCP (South Central Pool) wholesalers and asking them.

http://www.poolcorp.com/sales-centers

Looks like it might be this one:
Chicago - 38
3557 Butterfield Rd.
Aurora, IL 60502
Phone: 630-236-9100
Fax: 630-236-9191