Niche complications.

Well -- I'm having a hard time deciding between 2 niches.

I have enough money in paypal at the moment for 1 new project; and niche marketing is my favorite. Based on my own personal research and own knowledge, I've narrowed it down to learning acoustic guitar by ear and internet marketing.

I understand that theres probably not one thats better than the other because it honestly depends on how I develop it; but ASSUMING that I have great traffic, SEO, and content... which one do you guys think is better at the moment? I want personal opinions.

My personal thoughts are that since internet marketing is so big right now, that I would have great results with all the newbies that are exploring google and other websites looking for resources. On the other hand, learning acoustic guitar by ear, while not as popular, would probably be an easier niche for me to develop if I'm going for simple; seeing as I'm a guitar teacher myself.

As stated above, personal opinions please!