CV Audio Uptown Damansara is a branch from the CV Audio brand. The other place is in Old Klang Road and one other in Kepong. I only frequent the Uptown branch and deal with Peter (the boss) only. Their workers know me now and they do all sorts of things for me as a favor or something so sometimes I get lots of additional goodies for free or get quick fixes or something free. Their service is top notch and are quite customer friendly. Some might say that they are a little on the more expensive side (perhaps 30 to 80 more expensive compared to others) but their final results make them worth the price. They specialize in expensive marques and have solutions for BMWs, Mercs and even have worked on the R35. All happy ending stories. They specialize in tints and ICE.
EA Autoworks is in Bukit Jalil and they are more well known for mechanical mods (I deal with Drex most of the time). They take a lot of pride in their work and their final result is usually evident of their sometimes almost-arrogant attitude to their quality of work. You should see his handiwork with flush DRL installations. Howie is their ICE and alarm guy and I like his handiwork with alarms and electronics work. I've never done ICE with him as ICE is subjective in terms of sound and my taste in sound is 'unique'. But they have plenty of good feedback on their ICE work as well.
Personally - I think it's essential to build a rapport with the accessory shop you go to. They will look after you more if you do and sometimes having a friend as a customer means they'll give you priority which is always a good thing.