Isolation boxes are a hugely popular in home studios .(I have one ,and love it)
check around the net their are a few sites dedicated to building your own.
some brands can be quite expensive.
their are some brilliant ideas on using cheap existing products to make one from that work just as well
guitars-esp m1,esp vintage plus strat,85 gibson LP std,Hamer std,hagstrom xl-5,takamine 330r
amps-egnater tweaker,epi vj w/brat mod
efx-byoc/dvm comp, j cantrell wah,ocd,catalinbread dls,wampler plextortion,ibanez chorus,tech21 boost dla