Looking to upgrade my sound system to something better than present. The speakers in the e46 seem particularly poor and almost any other car sounds better than my supposedly luxury German performance car. Bizzarre. Anyway, that's out the way. I believe my car has the base audio 'business CD'. Which seems to be 2x speakers and 2x tweeters in the front doors and 2x speakers on the rear shelf. So six total. In the US it seems, they had a Hi-fi option (of which bavsound sell an upgrade kit) and the Harmon Kardon which we also have here. I believe I have the base system which wasn't sold in the US and I have a non-nav car, so just a single DIN unit in the front. When I see a car with speakers in the rear door cards, it must be a US Hi-Fi car, HK, or a cab. I want a kit that fits as easily as possible (ideally like the Bavsound kit...) without having to cut up the doors or anything like that. With this in mind I was looking at: Full Bavsound kit (no longer do the base audio e46 kit as far as I can tell, maybe I imagined this?) Rainbow IL-c6.2 BMW e46 Coupe - Specific Vehicle Speaker System (no longer available according to Rainbow website) MB Quart QM-165 BMW 3 Series e46 Custom Component Kit 16.5cm (read about trouble fitting this) I would like something reasonable but want to keep everything close to OEM and don't want to stretch to replacing amps or anything like that, although I'm well aware it will sound better; I just want something that's 7/10 rather than 1/10 which it feels like the base system is... Any advice? Guidance from others who've fitted the MB quarts fronts? Are they tough to fit? Anyone have some rainbows for sale?