I went the route of a dynamic mic similar to a Shure SM58 because of it's popularity everywhere. It's a mic that's designed for live performance and not preferred for recording. I found this mic to be very limited for recording vocals and acoustic guitar.
I personally will recommend you buy a condenser mic. You will not be sorry! It will pick up a lot more of the room you're in and give you a lot more dynamics. It's something you can grow into as you are learning

They do require Phantom power however so, make sure you have that available.
Here's what I bought and I'm VERY happy with it. I did a lot of research to finally pick this mic for it's features and cost. I can't believe it's so cheap at $159. Look at the review scores!!
AKG Perception 200 - Large Diaphragm Condenser Microphone
http://www.musiciansfriend.com/product/AKG-Perception-200-LargeDiaphragm-Condenser-Microphone?sku=271243BTW, my other mic is packed away now!
Rich