The Weber Sig is a less-precise, bigger gap, lower-cost speaker that gets an insanely good rap in small tweeds -- the '50s vibe, I figure. I've heard of several guys using 4 of 'em for micro Bassman or similar builds. If I did that, I'd mix 2 ceramic and 2 alnico -- classic. Or mix 2 Weber Alnico and 2 of something else ceramic -- another classic recipe. And did anyone mention? A ceramic 8 that gets super reviews is the Fat Jimmy 8 -- a custom variant of the WGS. One of those super reviews is from me -- I love it in my VibroChamp.