Hi I was thinking about purchasing a pair of instrument condensers, probably Rode NT5 pair. I want them for acoustic, drum overheads, piano, cello... I already have an AT4033Cl, MXL990 condenser, MXL991 instrument condenser, and a sm57. With the mics I already have do you think I would even need to purchase a instrument condenser pair? The main reason i want these mics is for drum overheads, but do you think i can make a pretty good overhead mix with the mics i already have and save myself $400?