Both the Creative Zen V Plus and the SanDisk Sansa e200R are compatible with protected WMA files, so you can purchase files from any online store that sells songs in that format. Some of the best options include Wal-Mart Music Downloads and of course Rhapsody (as the Sansa's name suggests). Another great option is eMusic, which sells tracks in the always unprotected (and always compatible) MP3 format. You could choose any one of those and stick with it for both players--if you want to go the "purchase to own" route.

However, if you really want to take advantage of both players' music discovery capabilities, you should know that both devices also support subscription-based on-the-go services. These services offer an all-you-can-eat scenario in which you pay a monthly fee to sample (or rent) all the music you can listen to from the often robust (2 million plus) song catalog. In your case, the service to get is Rhapsody To Go, as the Sansa e200R series is optimized specifically for that program (with some neat and handy built-in interface features), and the Zen V Plus will also work just fine with it. Even better, since each Rhapsody To Go subscription allows you to sync up to three devices, you and your husband need pay only the $14.95 per month for a single subscription.