I watched the first half-dozen on VHS years ago, good stuff.
The Wolf with Cub series was good too, much better than the bits-mashed-together Shogun Assassin "movie" version.
I assume you've seen Yojimbo and Sanjuro?
Chusingura was good if you don't mind the slower pace. It's the revenge story of the masterless samurai mentioned in De Niro's Ronin.