Clarion makes good stuff. I don't have any first hand experience with it myself but they have a pretty good reputation for their headunit..
If you are looking for more control than what that can offer I'd look into the Alipne DVA-310 and the PXA-H701 processor. That combo can control an active 3 way front speaker system and the crossover for the sub too. The Clarion won't be able to do this without the use of an added electronic crossover, which cost's more, and can add noise to the system.
If you want to go all out, I'd go with the Alpine combo. For the money (1600 online for the two) it's pretty hard to beat for the amount of processing you get.
Your gen5 Camry has 6x9's in the front doors. My '05 Tacoma does too, and I think they are the same size opening. If so, I'd take advantage of that and run an 8" Midbass in there. Then make kickpods for a 4" midrange. For the tweeters you would have a couple of different options. You can put them in the dash facing up towards the window.
Here's an intersting read if you plan on doing that.
http://forum.elitecaraudio.com/showt...threadid=96808
Or you can mount them in the A pillar facing each other. You can also mount them in the kickpods next to the 4" Midrange(this is figuring you are even going to want to do kickpods, I don't know)
Does this sound feasible to you, or would you rather keep it simple with a 7" 2 way component system instead?