I brought my older used Peavey combo 300 into a very reputable amp repair shop because the speaker was making fuzztone / farting sounds. It was the original Black Widow 15 in the cab, and the repairman tried to replace the basket, but somehow, (maybe due to a accidental fall, or being dropped before I owned it) the magnet came loose and shifted, and the cone was rubbing up against it. The repairman said he couldnt replace the cone, and said a new speaker was the way to go. He said he could order another identical 350 watt Black Widow which would take a couple weeks and over $200, or put a 400watt re-coned Eminence 15 he had in the shop into it instead for half the cost, $100. Is there that big a difference between the two speakers? I mean can the ear notice a discernable difference soundwise, especially while playing with the band? Is it okay to make the switch? I know certain speakers must be used for certain cabs, but the Peavey Combo 300 is just a simple very heavy box with a couple triangular ports near the bottom, and will be used for band practice, nothing really serious. Please, any thoughts?