I'd prefer free but I'm willing to invest few hundred bucks if needed.
In case of paid courses I'd like to know if they go staight to the point (i.e. no need for basic stuff) and, due to a full-time job, a self-paced program is a must.

Googling around I found Brent Ozar's 'Performance Tuning Classes', that could suit my needs. Did anyone take one of these?