Hi I'm looking to upgrade my front (and possibly rear) 13cm speakers. Theyre the original ones at the moment, what I want to know is what speakers would be good to run off a Sony CDX M880? The head unit is 4 x 52W. Am looking to get coaxials as I want to install it myself and doubt I'd have the capabilities to change the in dash tweeter. Am getting a sub and amp but amp is only 2 channel, hence running speakers off head unit. Any suggestions would be greatly appreciated. Thanks