I'd say "musicians," since the term "band" does suggest a smaller number of performers than is present in a typical Cirque presentation (I've seen 6 of the shows, 3 touring and 3 resident; hardly an authority, but still).  Similarly, "orchestra" suggests a larger number, but I guess it really depends upon the context.  Speaking of context, does anyone have any better copy for the LOVE subheading?  It reads just like a press release or advertisement, with lots of peacock words and the "Only at The Mirage" at the end.