I think I need an audio repeater - need simplicity

I use a Harmony 1100 and also installed one at my sisters with the rf transmitter because all her equipment is hidden in an enclosure. The Harmony downloaded from the online database everything except for one piece. Using the remote from that item it was a very simple process to teach the harmony everything it needed to control it and it works very well. Highly recommended.

A universal remote will probably work for you. For the Oppo, find out who makes the transport and use those codes. For the rest of the system, a learning remote should work. By using the learning function, you will not have to enter codes.

Good advice - thanks. The RF functionality is what I need and I believe the 900 can also learn from other remotes. I did finally find the MD and Oppo listed on the Harmony site.

Drrsutliff - did you have to attach anything to your sister's gear or was everything wireless? Thanks.

You can get the Universal RFS200 that does RF that you can get for 70 bucks. It's a full learning remote so will learn any component it doesn't already have, and it's built to last (I've been using an older model for 15 years with no problem). The Harmony remotes are good, but two of my friends who bought them both had them crap out in the first year (and I've heard others complain of reliability issues as well). If that's something that would concern you the RFS200 might be another option worth a look. Best of luck.

http://www.bhphotovideo.com/c/product/423521-REG/Universal_Remote_RFS200_RFS200_Master_Control_Powerpack.html

Thank you - I'll check it out.