I'm retired from the luxury transportation business in Orlando, my suggestion is go with an experienced company. Companies that have earned a good reputation, through many years of experience, they should be the ones logically, naturally, considered. I know these people below have over 10 years experience, some around 20 years.
All the companies below have towncars:
Carey
Starline
Trans Orlando
GNS Perfect
L&M
I'm sure you can submit any of the above names to any search engine (Yahoo, Google, etc.), to find their websites.
What I've noticed on this message board, by some of the complaints, ...you get what you pay for. If you are seeking only the cheapest, it's your vacation...
I'm just trying to help.
Happy New Year!