Trackdays are like crack. Do one and you'll be hooked. If you're short on cash and can't afford a trackday and all the associated gear (1 or 2 pc leather suit, racing boots, full gauntlet gloves, back protector, chest protector.... etc) you might want to look into the Total Control Advanced Riding Clinic (TCARC).
http://www.totalcontroltraining.net/index.html They're class is a more advanced version of the the Experienced MSF course. This would be a very good alternative if you can't afford a trackday.