what would be the best premium plugins for me to use to build an online storefront to preview and se

I’m an independent music producer and I would like to sell music online. I’ve been searching for solutions and there’s just so much to sift through. I was wondering what would be the best premium plugins for me to use to build an online storefront to preview and sell music? (previewing is key because people would need to listen before they purchase) If you could limit it to WPMU plugins that would be great I like working with suites where I could get centralized support. Also if you could compare with Nimbit.com because I may just go with their solution.