Which Speakers?

First of I would like to know, what kind of speakers I should get to keep up with the treble for my 15"s.

What Brand and what type, Components, mids, fullrange, or etc...
What would be a good deal on some too?

You could go with Memphis, they are very loud and very clear. You can get some components, or 6x9's will do the job, just depending on what your car holds. Also, Xtant and Diamond Audio are good.

thanks, mine are all 6.5" speakers that is what they fit

Get some components for the front and custom mount the tweeters and get some regular 3-ways for the back. The tweeters up front will give you more sound and better sound quality.

Any ideas where I can get a good deal on some of these, and do you have any model preference within the selection, without spending too much?

Not too sure, they don't sell their product over the internet. If you go to www.memphiscaraudio.com you can search for a dealer close to you. I know there's a place here in Houston that we can bargain them down in price. I don't know about other places.

Do you know anything about the audiobahn components and 3 ways?

audiobahn is average stuff

Audiobahn is all right, but they are over-rated. They don't actually handle as much power as they say. I have Audiobahn in my truck and one of my speakers blew with only 75 watts, the tweeters don't work, and the subs that I got came to pieces, which was a problem with the 99 series aluminum cones. My advice is not to go with Audiobahn.

Koda 6.1, for the price, nothing can touch them.

thanks, but since I can get the other recommended ones for cheaper than the kodo, I think I will either go with those or some audiobahns

You might want to check out some Rockfords, Pioneers, or maybe some Infinity's. Shop around and ask a few people around your area, see what they have, maybe if they let you hear it also.

A guy at a shop suggested some rockfords

I haven't heard any personally, but I hear they're one of the best.