Where should I advertise? (I don't mind paying.)?

[Jake]

Try a web search of: exposure for new music artists

To find sites that might give you some exposure to a targeted audience, rather than paying some general advertising network for a few banner or text ad exposures.

There underground youtube promoters who can help generate views of your video, which helps it's ranking within youtube.

Google's Adwords ad network can show text ads in their search results, or place text/banner ads on site in their network, you could hand pick sites you want your ad to appear on, you can have your cover art and name exposed for about $3 per 1000 impressions or show a text ad for specific web searches (your genre?) for about $0.50 to $1 a click.

There are coupon codes floating around that give a first time Adwords user $100 in their account if they spend $25.

There are paid and free tutorials on getting a youtube video to go viral.