you need to figure out what you want most.
sounds like you got a nice set up at work where you like your co-workers and you ok with pay but you are getting bored with your work and you want more pay.
if i were you then yeah, i'd take the transfer and prepare for whats to come and hope for the best.
kind of sucks you have to be on call and work weekends but this could be your ticket out to something you want.