i'd go with a 922, which is what i did. i don't use the sling much so it is great for me. when i have used the sling, it works just fine for me, although i could use a higher upload speed from my ISP, which is limited to around 750k upload. but it still puts out a great pic to my iphone. you should be able to hook up a dvd recorder to either receiver although i really don't know why you would want to, but that is just me. add a 2TB external hard drive to either machine and you will have plenty of space to record whatever you wanted. if you are not sure which one you want you might find a local dealer and go into their store and see if they have either machine hooked up and play around with each to see which you prefer. not sure if they demo the sling there though. hope you get what you want. oh, and i don't have a mac so i couldn't tell you about that.