KG, reliable, easy to find parts, cheaper to maintain and you can usually
modify them more.
Fiats are fun to drive being very peppy.
Midgets are...................small!  lol

Pick the one you really like and have fun with your toy!  ;-)
JMHO
dave
(One out of many daves)

Well I am opinionated and will contribute. Depending on where you live will
impact parts availability.  Ottawa has a good source for Spider parts.  MG's
are more common and Ghia's more rare. The Midget is a Mini Minor with a
sports jacket. Small 1000 cc engine, small space and the only two advantages
are the convertible and the fuel mileage. I don't know the Ghia well as I've
never owned one but they are tough to find usually. I own a Spider now and
bought it because it was the strong, handled really well anad was wider and
roomier than competitive euro models. The MGB's fit me when I was young but
now at 48, I find them tight. My first Fiat was a "128",  back in 75 and I
said that I'd never own one again.  I'm glad that I forgot that when I went
car shopping for my ragtop.  Spiders and Ghias have good resale values if
they are in good condition. A spitfire is a nice little car if it fits you.
Great to work on as the bonnet flips forward and takes the wheel wells with
it.  Good luck and have fun and as the truckers say, "keep your sunny side
up and your dirty side down".

Mike