Just looking at the photograph, I can say this... I don't like that base. It's narrow, there's no lateral bracing shown there, so it looks like it'll tip over easily unless it's on a hard level surface. I don't like the idea that it has a "optional" friction break, since usually this is a standard feature. And finally, I don't like the price. £500 (~$800) for a 6" Newt on a Dobs mount is very high unless it comes with a complete kit... which it does not.
The only complementary thing I can say about it is that it has a very nice looking 2" Crayford focuser. The focuser you get on a scope is very important since you need fine, jitterless control to find objects quickly and get the best views. This focuser is near the top of the line, but it still doesn't justify the price tag.
Here's what I'm talking about... Here is a Meade 8" Newt on a Dobs mount which costs £120 less than that 6" Orion:
http://www.telescopeplanet.co.uk/ViewProdDetails.asp?name=Meade%20Lightbridge%208%22%20%20Deluxe%20Dobsonian%20Telescope&prod_code=PON06A000013
This Meade has a very wide base. It's got a truss structure which you can disassemble for portability with very little difficulty. It's got a 2" Crawford focuser. It's got a friction break. And you get a free pair of Binoculars.
Each component is so small that I could put this thing in the trunk of my '05 RX-8... which is saying something!
The only real downside of this telescope I would say is that it doesn't looke like the top mirror cell section is rotatable, which can make viewing at odd angles uncomfortable for some people.
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Instead of shopping online, I HIGHLY suggest finding an astronomy club in your area and talking to local astronomers. You'll gain so much valuable knowledge about telescopes, you'll be overwhelmed. But you'll greatly improve your chances of making the right choice when you finally decide to buy.
Good luck, have fun. Backyard astronomy is a great hobby!
