Hi John, welcome to ISS!
You've made a great choice with the EQ6-R, I've myself been using one since I started Astrophotography about 6 months ago and have had no hassle. One big tip with it though - the newest series of it had a USB B port added to the mount head which means you can use a regular cable for connection. I highly recommend making sure that the one you buy is this latest series that has the USB port, it means you don't have to buy the specific connection cable previously required. Here's a shot of mine so you can see the USB port -
https://imgur.com/gallery/ExHCQpc. You'll also need a power supply as the mount comes with a cigarette style plug, you can pick one up from Jaycar for about $40 or so.
As for the scope, again you've gone a similar route to what I did (although I went for a 100mm refractor). At 80mm you'll be fine to do unguided subs (as long as you've polar aligned well) without issues. If you want to jump up to a 100mm I'd suggest an autoguiding setup.
My scope is the ES ED102 FCD100 (Carbon Fiber) series and I've been really happy with it for it's price point. One consideration though - the Explore Scientific scopes come standard with the Meade style finderscope bracket which is frankly a pain in the ass. You'll need a custom fit piece/adapter if you want to mount pretty much any non-ES/Meade style finderscope (thankfully ScopeStuff has you covered, I ordered one of these and it arrived within about 3 weeks -
http://www.scopestuff.com/ss_s2es.htm).
Other than that, what camera are you planning on using? Have you thought about processing software etc? I know it's a whole lot to think about but it's very easy to have budget blowouts or unexpected costs in this hobby (as I found out the hard way).
The community on ISS is great, with a ton of people willing to help out and answer any questions you have so don't be afraid to ask away! Welcome to the obsession of AP!
