I have a 2004 Tahoe with the Bose stereo. I am going to upgrade my stereo soon. Just wondering what ppl think about Infinity Reference speakers. They seem to be fairly reasonably priced. Will the 6 1/2" drop right in the doors? I don't want to spend too much money so I was just thinking of just replacing the 4 door speakers with some co-ax's and keep using the stock tweeters on the pillars.