I'm looking at upgrading the front speakers, with views of the rears and a sub in due course. I've found these from JBL - http://caraudiosecurity.com/gto-527-13cm-speakers - however, does anyone have any experience with these or recommend any others? Also, those speakers are 61mm in depth, is that shallow enough? Muchous gracias!
Front speakers are so shallow its not really worth it. I put pioneers in the front of mine and it didn't make a big difference. Best to stick a pair of 6x9's in the back.