Yosemite is quite spectacular!
On another note, I managed (on my lunch break!) to swap out the old AVR 789 for the new 2310CI purchased off craigslist last work.
It was quite a feat to accomplish in about an hour, since it involved:
1. undoing the screws holding on the door to my AV cabinet (AVR will not fit in/out unless the door is removed);
2. unhooking all my components and speakers from the AVR 789
3. re-connecting them up to the 2310CI (a challenge since I am operating somewhat blind, the AV cabinet is closed in the back so I had to do a little "reach-around" to connect some of the cables)
4. making sure all of my source input assignments correctly aligned with the old "names" so I didn't have to reprogram the Harmony (had to make sure the "Watch TV" activity worked when my wife gets home from work, or else she would notice the swap!!
5. Losing 15 minutes and having a minor panic attack when the cable box would not display... eventually I discovered that I swapped the blue/green connectors on the component cable! stupid user error!
6. deleting unused sources and renaming used sources again (e.g. VCR>"PS3", HDP>"APPLE TV", etc)
7. doing a quick 3-point Audyssey run so Dynamic EQ/Volume would be active again (no tripod! shoot me!
8. re-attaching the door to the AV cabinet
9. packing the AVR 789 in the box from the 2310CI and re-hiding it in the spare bedroom upstairs so the wifey doesn't notice
Obviously, I had no time to test it out much at lunch, but I was interested to see that Audyssey set my speaker levels about 7-8dB softer across the board. Crossovers and distances were identical with those set by the AVR 789 though.
The GUI is great, I don't think I could have hooked it up so quickly without it. As someone who is constantly fiddling with settings, often to test out functionality in order to answer questions posed by AVS members, I am not going to miss the old "audio/video drops out, screen blanks out for 2-3 seconds, OSD reappears" ways of the old 789.
(PS - if any San Diegans are interested in a perfect condition, "batpig approved" AVR 789, let me know!)