I think it's time to move into the modern age. The heads that I use are all over 20 years old and the age factor has me paranoid becuase of the frequency that I gig. So, I ask for the wisdom of the TB community, what is a reliable head? I use a pair of SWR Goliath 3's, so it would have to be capable of pushing those. I have considered, the Aguilar Tonehammer Head, Markbass, and Carvin. I love the HiFi sound and a nice deep bass thunder. Your opinions are appreciated.