I also have the Touring without the Bose. I recently changed out my stock speakers with the Polk Audio db Series. Took me a day and a half with the install. I'm sorry, no pics.
Here's the breakdown:
Front Dash - PA db351
Front Door - PA db6501
Rear Door - PA db651S
Sub: Infinity Bass-Link (I had one lying around the house)
The Polks were efficient enough from the output from stock deck but don't expect to rock the neighborhood. The dash replacement made a huge difference because the stock speaker was just a tweeter. The front door was replaced with a component setup. The tweeter was surface mounted 10 o'clock from the 6.5 speaker so it's pointing directly at me. I was too lazy to cut a 2" hole. The rear door is just fill and I could have left the stock in. I reused the plastic basket that were on all four doors. I just ripped out the old speakers and broke off the stock speaker brackets. I used the metal clips that came with the Polks and bent one end outwards to a 90 degree angle. There were slots in the inner lip of the basket and the clips catches the mounting screws that goes in at an angle. The sub install was pretty straight forward, tapped via speaker level inputs from the front, and since it's powered, the sub plays much louder. I have the remote bass level normally at 25%. I was fortunate that the amp for the Bass-Link has an auto sensing turn on feature because I may have connected the wrong wire from the deck (red/black) for the remote turn on. My next project will be finding a remote turn on wire. I don't feel comfortable with the amp staying on for 5 minutes after shutting off the ignition. I should have used my volt meter. I also installed the peel-and-stick Dynamat inside the front doors.
My only gripe is that the stock deck has only bass and treble settings. Due to the dash speaker getting an upgrade to the 3.5 size, the mid range is much more pronounced. It would be perfect if the stock deck had a mid level setting. Other than that, I'm happy with the upgrade. The music is much more enjoyable. I've played Top 40, Jazz, House, Dubstep, Rap, Reggae, Rock, 70s, 80s, 90s, and PSY's Gangnam Style. Next up is Telarc's The Great Fantasy Adventure Album.
A very big Thank You to the other members in the following thread, I was able get some valuable installation tips. Those white door clips were definite a pain in the 'okole (oh-ko-lay). 'Okole-your local Hawaiian word of the day. This thread was a really big help:
http://www.mazdas247.com/forum/showthread.php?123815167-Radio-Speakers-on-SPORT-model
Good luck to everyone on your installs!
