If WGS is resuming production of their G15A, then give it serious consideration.
Background ...
Way back in the day (early 1970's) I was learning to play and cobbled together an Allen Organ C3 tube amp and a Jensen K310 HiFi speaker to use as a guitar amp. The K310 was a coaxial 15" LF/HF speaker, and I eventually blew out the HF driver.
Circumstances took ever, and the K310 languished in my mother's basement for 40+ years.
I rescued the K310 several years ago, and decided to turn it into a Jensen P15Q, which was essentially the LF portion of the K310. After stripping off the non-functioning HF driver and cleaning up the frame, I had Bill Legall at Miller Sound re-cone it. The original smooth cone was replaced with a ribbed cone with a multi-fold surround. The driving amp was a 10-watt Allen Chihuahua, and the result sounded outstanding. Kind of hi-fi sounding, with a cool, squishy compression. On the downside, not very efficient and kind of quiet. And anything much more than 10 watts would probably blow it.
Looking for a similar sound, I ended up getting a WGS G15A, which, on paper, seemed to be similar to the P15Q, but more efficient and louder.
End result - the G15A sounds a lot like a P15Q-clone. Louder, and more gnarly; more mid-rangey, and less compressive.
I still have both speakers. The Jensen is back in the cab now.
Ed