wood).
There are plenty, that's for sure!
type.
Well, I'd cut through all of that and just try and simplify it all for you.
At the heart of an acoustic guitar you have to really consider what it's made of. If you're buying at the very cheap end of the market you'll be getting an instrument that's made from laminated woods. I don't want to use the phrase 'plywood' as that's a bit harsh or emotive but that's what you're looking at. Now, a laminated guitar may sound just fine to you but I'd say that the construction material is going to make much more of an impact on its basic sound than minor variations in body shape etc.
I'd say it's important to pick an instrument that firstly *sounds good to you* and then has the features you're after. If this means that you get a guitar with no cutaway and a twelve fret neck then fine!
So, if you're in a guitar store and pick up a £150 guitar that has a cutaway, a nice looking top, some electronics etc. give it a play. Now pick up a £300 guitar which is made from solid timbers I'd hope you can notice the difference. The £300 guitar may _seem_ to have far less appointments but it will undoubtedly be the better _sounding_ instrument. It's up to you to pick a instrument that you're comfortable with... either may be right for you. Once you've got an idea of sound you like then picking out a guitar is much easier.
Having said all of that you're still going to want to know the differences between a Parlour, 000, OM, Dreadnaught etc then do treat yourself to this book.
http://makeashorterlink.com/?X51964953 It will cover an awful lot of general guitar questions you might have (like this) and much much more.... it will be with you for *life*