Lewm,
You should get terrific results from a low output MC, I've used them exclusively on my Lenco and I highly recommend them, especially the 103. The step-up is important and for that you should try to find some beyer dynamic trasformers (Jensen) they are the prefect ratio for the 103 and it makes for an amzing step up. Do a google on mic transformers as step ups to read up on it, in fact, here is the JE Labs page :
http://members.myactv.net/~je2a3/mic-mcstep-up.htm
You should get terrific results from a low output MC, I've used them exclusively on my Lenco and I highly recommend them, especially the 103. The step-up is important and for that you should try to find some beyer dynamic trasformers (Jensen) they are the prefect ratio for the 103 and it makes for an amzing step up. Do a google on mic transformers as step ups to read up on it, in fact, here is the JE Labs page :
http://members.myactv.net/~je2a3/mic-mcstep-up.htm