I have a 28" inseam, 29 with shoes on. I ended up getting a Valkyrie with 26" wheels. It fits perfectly, but has some drawbacks. I love the ride and handling, but tire choices are limited, although the Schwalbe tires that are on it work great. It's steel, which does provide a nice ride, but is on the heavier side.

It is tough to get a top tube short enough, with enough stand over clearance, and avoiding toe overlap on the front wheel in small sizes. My Ruby 48 fits well as my road bike with 700c wheels, but the top tube slopes too much to do any shouldering.

My dream cross bike? Same fit and geometry as the Valkyrie in light weight carbon! Not being made to my knowledge, other than custom.

Good luck on your quest. Cross is a hoot!