For my upcoming trip I have booked SunRay www.sunraytransportation.com. I have not traveled with them before, but have heard great things. If you mention The Mouse For Less, you are likely to get a discount if you are booking a round trip fare. My r/t cost after discount is $82. I will base my (20%) tip on the before discount amount, however.
We have used them several times without incident, and have always been treated to wonderful drivers. One time, our flight was supposed to get in at 10:58 pm. Our flight was so delayed, we were not at baggage claim till 1:45 am, and they were there, patiently waiting for us. We were one of the few people there with their car service waiting for them. They will always have my business as a result of that. They have NEVER let us down when our flights were delayed.
I booked a limo through Payless Transportation - $150 r/t + 20% gratuity. There will be 2 families (8 of us) so we split it in half. The towncar rate is $80 r/t + grat. Here's the link to their price list: