Okay, this is something I know a lot about, actually. I’m an amateur astronomer, and I have owned two telescopes.
First of all, you’re not going to get the same quality as the “super powerful expensive” telescopes for under 700. You’re just not. But that doesn’t mean that you still can’t get a decent scope. So, before I answer your question let me ask you some questions first:
1) Do you live in a city or a country—i.e. do you have a lot of light pollution?
2) Are you going to need to carry your telescope around—i.e. do you need it to be relatively portable?
3) Do you plan to do just visual observing or do you want to do photography (a lot more time and money involved)?
That’ll start for now. Based upon these answers, I will either make a recommendation or I will ask you some more.