I have to take an iphone or ipad to Boulder Mac Repair, damn near once a month. They're on Broadway, about 1/4 mile north of Pearl St. Mall, near the hungry toad bar.
$100 for an iphone through gen 4. $125 for iPhone4S and iPad1or2. iPhone5 and iPad3, I'm not sure of price... they'll be more due to their "retina displays".