I'd go for a made horse every day of the week. Problem is I can't afford one, so I take a gamble and take prospects who might or might not work out. And then I get to training frustrations with them.
You asked if it is satisfying showing a made horse. Yes, as you are showing at your level. Honestly it's only more satisfying if you are doing 100% of the training on a green horse - sending out to a trainer, is about as much 'cheating' as buying a made horse. All you are doing is paying the trainer to make your horse 'made'. It's kind of silly, really.
If I could afford a made horse, I'd be very happy, I'd be riding at the level I'd like to be at, and I'd be showing every weekend.
Edit to say, I think I am a reasonable rider, however I am yet to ride a made horse who didn't teach me a bunch of stuff. Experienced horses make us better riders in my opinion.