As well as me having the BHSE, I've also got on order the Aristaeus + GS-X to which I received an email from Justin last week asking what colour finish I wanted the front panel/knob, [ I've gone for Silver ] so hopefully I'll have them soon. I've ordered those two amps to give me a change. I've also just got the Senn HD600 to use with the GS-X, though until I receive that amp I'm driving the HD600 with my Pico Slim and I'm very happy with the SQ, the HD600 is also the most comfortable headphone I've ever worn.
P.S. I said I was very happy with the 009, but since then I've found there are some songs I listen to with them I'm finding uncomfortable. So after hearing about Sennheiser working on new electro headphones, I'm auditioning them when released and if I like one, I'll be getting it and letting my 009 go.