Ok I need some help and my school is going to be buying a few new instruments in the next day or so. I need opinions on Source 4 vs SL. i have had experince and have read specs on source 4 but i hardly have heard anything about the strand sl's. we have a strand system so i was maybe wanting to keep strand but source 4 are pretty damn good. we will most likely be getting 2 source 4 15/30 zooms. any advice would be great. i think we'll be making the decision around 4 tomorrow.