I'm a huge Ozric fan and have most of their albums. It's hard for to point out one or a few albums cause they've done so much good stuff, but I'd say in general, don't start with the 80's material, cause those are a little weak (in comparsion, of course).
The album that got me into Ozric was Jurassic Shift...so that will probably be a good start.
Another album I've listened alot to is The Hidden Step...