Looking to buy a Vortex HD spotting scope. I'm thinking about their 16x48x65mm scope. I know they have even a smaller design but I'm thinking the 48 power could be the best of bough worlds. Question for anyone that has seen or used this scope. Is it generally enough power for spotting compared to 60 power. Is it noticeably smaller in size and weight to the popular 20x60HD? My idea is a more compact scope for back pack carry. Another question is which tripod has been working the best for the same application.