I don't find Pilates boring, maybe because they are not that easy for me yet. I have a few DVD's that I rotate. I really like Kathy Smith for abs and lower body. She doesn't move too quickly and gives lots of reminders throughout.
I don't like Denise Autins (sp?) DVD, I can't get over her voice, although I think it would be good for yoga. The exercises are good though and I put her DVD on maybe once every two weeks.
I would buy Windor Pilates if I could find it on DVD. I don't have a VHS machine in my bedroom where I do my workouts.
I've noticed an improvement in my abs since I've been doing them for about 2 months now. Each workout is only about 20 min. long and sometimes I put on two DVD's depending on my mood.

