Maureen, I was on the same boat about a year ago. I must have looked at everything out there and finally I came across this video on youtube. Long story, longer, I ended up going with Wet Sounds Pro 80's and I couldn't be happier. Here's the link to the video..keep in mind, I do not live in TX and did not go to this particular shop to get mine installed. Good luck!
http://youtube.com/watch?v=y9rgOtngXvs