I'm looking for a greenback speaker with a nice fat midrange, defined high but not ice picky and a nice full low end which the original greenback lacks. This speaker will be going in a 15 watt 8 ohm vintage tube amp for blues and classic rock tones and would prefer a semi non efficient speaker without a ton of headroom and output. There are just so many speakers to choose from. Eminence private jack, gb128, wgs reaper etc... but most seem overkill in the wattage department. im looking for a decent breakup like the greenback, just more low end......does anybody have any ideas? Thanks a lot.