Eminence The Wizard-8

Depending on what you are looking for you may be able to stop looking. Mega tones right here for heavy work but equally pleasant with clean and early breakup tones. I am using them in a closed back 2x12 setup and they sound rad. Also, I used one of them in the Blues Jr. (which is open back) and that amp never sounded better. It makes you want to play and play. Very dynamic tones, look no further

I bought this speaker to replace the stock speaker in my Marshall Tsl 601 since it was slowly tearing itself apart (No idea how that happened).
It really livened up the amp. The cleans sound nice and chimey and the crunch is just brilliant. With the stock speaker I practically only used the lead channel because I didn't like the sound of the other two channels. Well thanks to this speaker now I have three excellent sounding channels to play with! Feel like your amp is missing something? Consider a speaker swap before buying a new amp, you might be surprised.