There are a few choices from Kodak, E100VS, E100G, and Elite Chrome, the E100G the one that people tent to rave about, but I prefer Elite Chrome 100EB This is a personal preference.
I admit not being a Fuji fan and I have only tried Sensia I did like it as much as Elite Chrome, there is also Velvia, and Velvia is the Fuji film that people say is best. I like Kodak film so I am just presenting choices here.
Slide film and processing can be a bit on the pricey side, but still I would recommend getting your hands on several different kinds and trying them out to see what you like best, think of it as an investment. Remember that Chrome can act different depending on how you view it, scans, prints, and projection will not look the same, and prints and scans depend a lot on the skill of the person making them.
And YES, all five of the films I have mentioned are readily available either on line, or at a camera shop. I know a few places that have Sensia on the shelf right now today that I could walk in and buy. I would also like to mention that Kodak's film sales partner that handles their direct on line sales does not 1/4 of what Kodak makes.