I have a JVM205C that I really like, but I would like to try to replace the Vintage 30 with a speaker that doesn't have the same mid hump, which I find tiring after a while. Beyond this, it can be as close as possible, as I think Marshall did a really good job combining speakers in this. For what it is worth, I got the amp to basically use it as a hot-rodded Marshall. The range I need is, say, from Scott Gorham to George Lynch; anything beyond that is a bonus. I would prefer that the new speaker also be a Celestion, since those are easy to find locally here.