Mike
You're getting good advice.
Definitely keep quality and after sales service uppermost of mind, especially as you're just getting into astronomy.
In that regard I'd give some serious thought to what Iceman had to say about myAstroShop and a Skywatcher.
If youre' feeling brave, sidestep the Dob and get an 8" or 10" on an EQ mount.
Sure, there's a little bit extra to learn with the mount but it's great once you get the hang of it and you can add drive motors later on for only a cuppla hundred $$$$$$$$.
Very handy for pix and visual at high magnification and IMOH a lot less hassle than converting a Dob to a tracking mount unless you're a handy sort of bloke?
The other thing is you'll get lets of over-the-phone help from someone who won't rush you off the phone coz they're trying to make another dozen sales an hour