I'm not sure about the HD resync or optical audio questions you raised, I haven't run into those issues before.
I can say that the on-screen remote will do what you're asking. There is some delay and jerkiness when you start using the remote just like any Slingbox, but it's certainly not slower than the Pro. It's fast enough that I can edit out commercials on my DVD/Hard Disk recorder before burning to disc without getting frustrated. That's over the LAN though. The remote is kind of pokey over the internet. It's okay and usable, but it's a bit of a drag if I want to do a lot of FFW/REW.
The only other comments I would make in favor of upgrading is that I like the connector layout on the back of the Pro HD better, and since it's the current top-end model it should have a longer support and compatibility life. Right now, it has all the available options and works with all the available SlingMedia features. It's up to you if that's worth the money.
Hope this helps,
Is the resolution on the Slingbox Pro HD supposed to be any better than the Slingbox Pro with the separate HD connector?
I have both and I don't see any difference between the two. I'm running a WiFi N network, so bandwidth is not a problem.
This is odd.
EDIT: Got it streaming HD. Better now. The automatic setting under "Options -> Encoding" were insufficient under the automatic setting. Once I set it to manual and increased everything to the maximum, it works the way it should and shows HD in the lower left instead of QVGA. Hope that helps for anyone else that is dealing with this.
Message was edited by: SteveNYC