I am getting the following installed on my car at the moment mate
Morel Hybrid Ovation II - fronts
Logic 7 Center speaker
Logic 7 Rear Decks - I bought some Rainbow Vanadium's in hopes they'll fit the rear decks, but they unfortunately dont :-(
SWS8 subs
MS 8
Audison LRX 6.9
I did quite a lot of research on the 4"'s and the Morel's came out on top SQ wise, I got mine from Isreal, contact ebay seller superdeals.ltd, costs about £275 + VAT + Customs charges, or contact seller rs32 on talkaudio, he had a complete set on sale for £350 or if you are happy with Morel Dotech ovations, you could get it from ebay seller captaincable for £250
How did you find the focal's on your E90 ? If you were happy with them, then they are available for £188 from lots of sellers on ebay, caraudiooutlet being one
http://www.ebay.co.uk/itm/Focal-100K...item4165044777