Looking for suggestions for speaker replacement. Current install CelestionGreenback G12M, 16ohm. 25w. I'm considering to replace with a speaker that will be brighter in the NT. but still, could provide the beautiful Vox tone when needed. I wear hearing aids and my tastes have changed to a brighter sound for playing. I play at low-level # 5 on the Vol. Rhythm only. I haven't made it to the point of playing the lead, but do wish I'd get there soon. Any suggestions?