Depending on the size of the sub you may be able to get a powerful enough multi channel amp to run both the components and the sub ie. Alpine PDX5 but like I said that depends on the size and power needs of the sub you intend on getting.

Single 10'' sub. I could get a 4channel amp, run 1 for each component and bridge the other 2 for the sub, right?

Is power acoustik a good brand?
Power Acoustik - 1600W Class AB Bridgeable 4-Channel MOSFET Amplifier - BAMF1600/4

Edit: I guess I can.
Tri-mode capable
Lets you run a subwoofer along with 2 speakers from 1 amp.

Ok, I think I am gonna get the alpine type-s and run them off of deck power (DBs were my first option but BestBuy does not carry them). I will then get a mono amp and run a 10in sub.

Edit: I heard the twitters on the Alpines are too bright.. any experience with this?

I would pass on the db's if you are going to run an amp with them. Get one of the higher sets.

I do not see the alpine tweeters as being to bright.

Also X2 on the PDX amps.

You've all been repped. Thanks guys

I am a little late on this, But if you are planning on doing this please get an amp and do it at the same time. It will be a night and day difference. Promise...

Run the typeS from an amp?

I would get the type r's for better sound threw an amp.

everyone gave some great advice... whatever set you choose compared to the factory set it will sound tons better............

Definately agreed-

Just bought a pair of kenwoods and running them off an aftermarket nav- Even that alone is enough power-

Eventually I will get some JL co-axel speakers & amp them with a sub

Good luck!