There is a 2 disc set all conducted by Sir Georg Solti called Thunder and Lightning which would be a damn fine start. As a trombonist and heavy metal lover myself, I can attest that it's fantastic.

http://www.amazon.com/gp/aw/d/B00000DLUS/ref=mp_s_a_1_1?qid=1422578004&sr=8-1&pi=AC_SY200_QL40&dpPl=1&dpID=41YQMVQ7WHL&ref=plSrch

Plenty of cheap used copies available