I got crisped driving to Miami in a convertible. I wouldn't bother again.....
I did the PCH from San Francisco to San Diego (then onto Vegas) in September and it's a fantastic drive in any car.
Whicheverone you go for will not be a disappointment. I'd let my heart rule 100% as you're not buying it. If your head came into it you'd be in a Toyota Camry.
Look at picks of them, watch youtube vids.... which gives you a semi is the winner!