Two editors/authors that have been recommended on this site before, and look like very good options to me:
And, not to self-promote--oh, let's face it, I'm about to self-promote
--I'm a freelance editor myself, and have tackled a few projects in my time. I can work up some glowing references if you want them
Plus, I work for practically peanuts. The drawback is that I'm pretty busy with other things, so probably wouldn't be able to do it as quickly as people who get to work on this kind of thing full-time. But if time's not an issue, and price is... message me about it and we'll talk
But first, you might just want to put up a few pieces of your writing for the population of Writer's Beat to look at and comment on! That's free, and it gives you a good idea of what you can fix yourself.
As an editor, what I'd do first would be to look at your first chapter--for free--and identify your problem areas grammar-wise and whatever else jumps out at me. Then you could decide whether or not it'd be beneficial to you to work with me.
Before you go getting an editor for line work--though that's a really important part--you should probably try a self-edit with the advice you've gotten on your writing samples working behind you. You should be sure that the story you've got is the story you want, and just reading over your manuscript carefully is the best way to determine that. A grammatically correct, but poorly set-up story isn't likely to get far! Definitely try to self-edit and make sure you can follow your story from start to finish before paying somebody to polish it up. Most editors also provide general analysis, ignoring grammar in favour of structure, which is a really good idea, but if they run into major things--gasp! Plot holes!--they have to send it in a certain direction that they think would fit as readers
. The original cohesive vision is the writer's, so make sure you've tied your threads together nicely before subjecting it to the red pen!
Ahem... to add an abstract:
I do editing work for peanuts, but it takes some time. Take advantage of free advice before paying. Self-edit before paying. Pull your novel together before paying.