Your search "vivid color" resulted in 3 Articles
I found the Portra 400 VC a great professional film from Kodak with strong colours and saturation. It's now discontinued so get it while you still can!
Sharper, more colorful and just vintage are only some of the few advantages of using medium format films!
If you're looking for fun and an enjoyable experience then you should try Ferrania Solaris film.