Hi, I have H659 and wanted to use it to control my pc I would like 2 general functions

1) PC control: volume, mouse functionaliy, sleep, wake

2) Beyond TV control (will use girder if needed)

Should I get the StreamZap or the firefly mini?
So basically I need the most compatible receiver with the most functionality. If I get the firefly mini then I wouldn't need girder correct? I could just program the H659 with the mini's codes? Would I then be able to control the mouse and volume or would I still need the girder software for that? I am a newbie so please explain.

Thanks