It takes about 15-20 minutes to warm up. I plug it in first and then start setting up the scope, which saves a little time. The DayStar battery works well and holds a lot of charge. The Quark is definitely frustratingly slow to tune.
The big selling point for the Quark is that you can put it on bigger and bigger refractors and get amazing views. Of course you have to figure out the ERF or filter.
Yes, it could have been that the one you looked was not warmed up. Plus there is variation among units and perhaps it was a little wider than others. And there is not that much difference between the 60 and an 80 anyway.
On my 70mm f/6.8, it really didn't add much compared to my LS80 DSII, so I never used it that way. It was great on my 155mm, but that is obviously not for quick looks.
Now that I upgraded the 70mm to a 92mm f/5.5, and it is a different story. The 92 is big enough that I see impressive detail around ARs and really nice proms (due to the bright image). The LS80 DSII has significantly higher contrast. But the brightness of the image allows me to go to higher magnification in the Quark.
Tough choice. If you are really just 5m looks, the DS will give you better contrast and nicer low power views. If you think you might try bigger refractors, then the Quark will bring you to another league in resolution.