I knew nothing when I started at all and bought a Thomann cheapest I could find......it has done me real real well (100 plus gigs and 5 years abuse) but I absolutely believe in hindsight that I was very fortunate with the build quality.
If I started now knowing what I do and listening to your dilemma (although not 100% sure how acoustic you mean) Id be buying second hand and have me a budget of 6-700. There's been a few stentor 3/4s for sale recently and I think they are really solid well made and great value for money and Ive been sorely tempted to buy one just because....well....just because....
Find a friend, dont be put off by the cheaper ones, try them out. I'd make sure you are happy / comfortable with the neck width, as Ive tried a few with thick necks and they feel rubbish and difficult to play......
whatever you decide just make sure and slap it hard at some point in your journey :-) good luck!