I'm an Astronomy major with an emphasis in Astrophysics. So my career is going to be in studying the sky and deep space objects. I have owned several telescopes in the past but never really learned how to use an equatorial mount (I was about about 8 years old at the time and didn't have the attention span to learn such things). But now that I know how to align and utilize the different types of mounts, I've figured it's about darn time for me to get some optics. I've been looking around on Craigslist and found a 6 inch Dobsonian, used, for $200. http://phoenix.craigslist.org/nph/for/1968592871.html [Broken] I also found a couple Schmidt-Cassegrain 8 inch telescopes for between $500 and $700 dollars http://phoenix.craigslist.org/wvl/pho/1963150052.html [Broken] http://phoenix.craigslist.org/evl/for/1896472116.html [Broken] --------------------------- I will be using the telescope to view both stellar objects, galactic objects, and intergalactic objects. So I need something that will cater to a wide range of observations. I'm trying to stay on a limited budget (even though I have the money to buy a $1000+ telescope). I know that light buckets are going to give me brighter observations than a similarly sized SC. And I know all about the calculated advantage of using an 8 inch mirror over a 6 inch mirror. But I don't really know what the real world, observable, difference would be when you have 180% more light gathering capability. And will it be significantly more difficult to locate deep space objects with an alt-azimuth mount as compared to a equatorial mount?