Audio/Visual & Electronics - Complete Set-up

So I have a 1995 Honda Civic EX Coupe and I am going to be replacing the stock head unit, speakers... What size speakers are in the front and the rear? What is a good brand I should go for? Would a 8"/10" do the trick to add a little bass because I dont want to give up too much trunk space? Any help will be greatly appreciated.

Door speakers are round 6.5", and the rears are 6x9


hope this helps

^are you sure because when I took a look back there they didnt look oval to me? It looked like it has 5 1/4 or 6 1/2.

The 95s may have 6 1/2's open the trunk, stick your head in and look up, oval 6x9, circular 6 1/2. A 10" sub will give you the extra umph you want without giving up too much space, you will obviously need an amp, but whatever you do, do not mount the amp to the sub box to save space, it will damage it in the long run. As for brands, it depends on how much you have to spend, here you will find that most agree Infinity is the best bang for the buck, but JL makes very good subs/amps as well, Pioneer makes decent speakers, others will give you more brands.