There are different ways you can do it. Paypal is a pretty universal (and pay as you use) solution. I use 1shoppingcart for the most part. Both will allow you to create a drop down with different options and you could do it that way, but i prefer different buttons for each product. I feel that it's clearer that way, and a little easier. I wouldn't go through CB for music. Maybe your meditation product. They charge 9% which is high. You might find a few affiliates for meditation but I really wouldn't expect it from music. I'm not a fan of the CB affiliate crowd either. There are some good people, but most are just discount seakers. 

I deliver the product through the welcome email of the customer list. If you go with Paypal you can integrate with Aweber. This is covered in MMM 3.0.

I'd honestly just start with Paypal to keep your expenses down. Get a shoppingcart later and just get this thing going. Is this for your music or your meditation program? I would usually recommend limiting the main offer to just one thing and then offering the bigger package as an upsell. Sometimes I do it differently, but on average the less you ask a person to decide on, the better.

I've never tested it but I've seen studies by others that showed that sales didn't change at all regardless of using Paypal or Credit Cards. I'm not sure how PP handles charge backs. I couldn't imagine that it would be too massive of an ordeal. The huge majority of people to order through Paypal will be using their accounts so chargebacks won't be how the issue would be handled. I would really just go with the easiest solution to start and not spend another cent on solutions. You have what you need. make some sales and then change things up as you feel necessary based on conversion rates and the customer flow.

Sounds good.