I will be flying in on a Saturday, midday to TPA

I currently have reserved a Premium Elite SUV, which is usually a Q5 when I rent from enterprise. I also have the option to reserve a mid size lux sedan. Just wanting to make sure I get something luxury

I have never rented with National. Should I be choosing one or the other, to have a better chance of getting a luxury car?

I don't need the aisle.

Also, is national or enterprise better when renting and getting what you want?

Thank you very much