Hi guys. I know this has been discussed Many times hut im after a bit of advice about my s3 sound system. Firstly my s3 has no bose but the symphony head unit. So i want to know what head unit people would buy for around £150. And i already have a 10 inch db audio sub. Directed 250d 2 ch amp and a kenwood 4 ch 600 w amp. Was wondering what people would do with these. Do i use the 4ch amp to run front components and sub or use the directed amp on a sub and 4ch amp to run front and rear speakers. Im going to get this all installed so i could do with know what to get fitted. Any help would be great guys thaks