Once you get past a certain magnification range, even the best glass will start losing contrast and "gray out". However, with good glass, the image quality will always be better compared to mediocre glass so the viewing experience is more enjoyable. It depends how much time you spend behind it. Most people can get by with a generic spotting scope to get the job done. If you're more critical of the sight picture, then the extra money is worth it.
Again, I suggest checking out birdwatching forums for advice on spotting scopes because the birdwatcher demands accurate picture reproduction.
For a stand, I use a Giotto 9240 tripod with a pan head. It ends up being cheaper and sturdier than some of the shooting-specific stands and it doubles up as a camera tripod. A pan head allows very precise movement and lockup. I tried the spotter on a Gitzo tripod with a Markins ball head but the ball head didn't have enough precision at magnification. Maybe it's possible for smaller spotters to get away with a ball head. I run an 80mm spotter so maybe it's simply too hefty for that.