If you have a dark site and enjoy just looking up and gawking at the milky way, go with a roll off roof. I live in a very dark location and often make the mistake of looking up and I quickly become lost in the wonder above. I say mistake because I often have things planned out to look at for the evening but that all ends as soon as I see that sky above. I wouldn't trade the sky-wide view I have with my roll off roof for any dome...
Matthew
http://www.darkgeorgiaskies.com/
