Both are good ideas.
Mr Wizard makes some really nice door pods if you want to go that route.
I personally have the q-form kick panels. They are made to hold a 5.25" driver and a seperate tweeter. Very nice panels, with the only problem being that you have to relocate your ECM to make room for the passenger pod. I mounted mine in a box up near the firewall. Other than that small problem, they are great.
Crutchfield carries the panels, but they are probably cheaper elsewhere if you can find them.