Lauren-I would recommend the FIRM Basics (they are beginner/intermediate). You can always make them harder by adding more weight. My favorite intermediates are Not so tough aerobics (don’t believe the title it packs a punch), Lower Body Shaping, Fat Blaster and Tough Cardio Mix. My absolute favorite is Maximum Body Shaping (Tracie Long is the instructor). Check out their site
www.firmdirect.com for more info. Go to the FIRM Store section and there is detailed info on the tapes. Hope this helps