Dodge Durango - Speaker Advice Needed

[kingofgrills]

Alrighty, I have a '99 Dodge Durango SLT with the factory upgraded Infinity Sound System. It consists of door mounted Infinity tweeters and 6.75" mid-bass units up front, with 6.75" speakers in the rear doors - all rated with a 2 ohm impedance.

Up until recently the system sounded great for a factory system, with a lot of detail and tight bass response. Recently, the speakers began to rattle, front and rear, with any bass output. The treble remains crystal clear and undistorted. A noted problem with the speakers in this system is that the woofers separate from the surrounds, and I think that's what happened here.

I would like to replace the speakers while keeping the rest of my system unchanged. When running fine the system sounded great, and besides, I focus all of my critical listening at home anyway. Would any of you be able to recommend some good speakers that won't break the bank? I need a 6.5" two way component system for the front, with a good 6.5" speaker for the rear. Both should be rated at 2 ohms in order to match up with the factory Infinity amp. I would like to spend around $250 tops for the fronts, and a bit less for the rears.

Would Infinity Kappas be a decent choice? They're 2 ohm rated, and the outgoing Infinitys sounded good.

Thanks for the help.