The Honda (maybe Acura too) dealer use MasterCraft and they did some work on our last 2 Hondas. They did a great job but it was either warranty or insurance so I'm not sure about pricing.
How long ago was this? They did a horrible job on three of my friends' cars (all yellow S2000s), but that was three or four years ago. Hopefully they've cleaned up their act by now. Last I heard, (Don Carlton) Honda stopped sending their customers to MasterCrap due to the lack of quality in their work.
Shawn, I had Danny Myers paint a rear spoiler for my S about a year ago. Instead of taking the whole car over there and risking overspray, I let them borrow one of my of OEM side mirrors to match. They did a great job matching the color and even the metallic flake, although that might not be an issue since your paint is probabry a flat color.
No personal experiences with Karoll Martin, but I have never heard about any bad experiences there. IIRC, that's where Kyong had his NSX repaired.