LDC's or SDC's will work it all depends on the mic. And matched pairs are really needed, but i guess you could do it without. If at all possible, try and get mics that have atleast somewhat the same frequency response, If you have a way of testing them before you buy them. Ive used c414 LDC's and some Rode SDC's, and they both sound good. The rode's were much more detailed, and the c414's were more smooth.