First off, I'm about 53 (depending on what year this is ) and I still need a tweeter.
Your center channel should match the fronts as closely as possible for a smother transition of sound from the left to the right. That's going to be tough to do with a diy center channel.
No offence, but you can't just put some drivers in a box and expect it to sound good. It takes a lot of experience and trial/error to get good at it. I'd start with a simple two driver and a tweeter (MTM) design as your first attempt. A Partsexpress pre-assembled crossover should work O.K. but it won't be ideal.
I have used the 5" drivers you're thinking about but they are really too small to give that punchy bass you're looking for. They are really a 4" driver. Home speakers are sized/labeled differently then car drivers, and from each other. Ther's really no consistancy. In fact, that 5" driver is exactly the same size as a 4" car speaker. I'd at least move up to the 6" model and use the 4" Daytons and an actual tweeter in place of the 3" driver. You might also consider adding anl L-Pad to control the output of the 4" and tweeter. One of the jobs when designing the crossover is to match the output of all drivers to a consistant level. All of those drivers have different SPL levels. http://www.parts-exp...tnumber=260-255
And the Dayton DC series are also very good http://www.parts-exp...tnumber=295-302
The 3" and 4" are listed as going to 20,000hz but I can't imagine they would provide as smoth of a high end as a seperate tweeter. But I have never used them so I can't really say they couldn't either.
What I would do is to find a good MTM speaker kit designed by someone with experience building speakers, or copy a design already being used. You can find speaker projects at partsexpress and many other websites. Google DIY speaker projects.
This is a tower speaker project but the speaker components and crossover are available seperately. Ask PartsExpress if they can put together the components for just a center channel to match the towers.
Here is a link their speaker projects
They also sell assembled and knock-down cabinets.
But I would do a lot more research before taking on such an ambitious project. But speaker building can be a lot of fun. Just be prepared to be a little disappointed with the results. It's not as easy as it looks.
"Everyday room": Panasonic 58" Plasma, Dish HD DVR, Pioneer Elite vsx-23, BDP-23 BR, dv58avi universal dvd player, Dynaudio Audience 50's, 40's 122C, Dayton HSU-10 subwoofer.
"Movie/Music room": Toshiba 65" DLP, Dish HD receiver, Adcom GF-700 5.1 receiver, OPPO BDP-80 BR player, Polk LSI25's-LSi7's-LSiC, 2 original Dayton 10" "Mighty-Mites" subwoofers. (subject to change without notice).
Also have...too much to list. Help me.