An option I'm using in my next install is angled speakers in the dash. The stock single dash speaker is removed and replaced with a "V" bracket that aims each 4.5" speaker at the opposite side (firing across each other). I spent some time with a guy at a show that did this, and the sound was really good. Much better than speakers by your heels, and almost spatial as it reflects off the windshield. He used the balance and it was perfect, sounding like you had mounted a speaker right in front of you. His little speakers were good quality for the price at nearly $100 for the pair. In-fact, he had to fade the little front speakers quite a bit or they were overpowering compared to the 6.5s and 10" sub in the back. Sorry - I don't remember the brand. HTH
David