Raw costs are probably $1100 for the two doors and $350(?) for the opener. An installer would probably knock it out in 4-5 hours. So your quote is pretty reasonable.
I'm fairly handy, however, I knew I would be fussing getting everything aligned right so the doors operated smoothly (never installed one before). It might take me a day to get the first door set up and maybe another half day to do the second door. Then I still had to dispose of the old heavy wooden doors and I don't have a truck. Finally, I didn't want to deal with setting up the torsion springs (well, winding them). So I gladly farmed out the door install, but since they weren't crazy about dealing with the jackshaft opener, I did that myself. Low and behold I did have to fuss with the springs to balance the doors so the jackshaft opener would work without tripping the cable tension monitor.
So like many things, it depends on how you value your time. If you've got plenty of it, DIY and save a few hundred. If you just want it done in a day without any headaches, pay someone that does it day in and day out.