Hello: I've played for forever using smallish 1-15" or 1-18" cabs either head/cab or combo amps, and most of those years didn't go through the main PA. Now, playing in a more R&R band, I've toyed with and decided against using a larger, more complicated on-stage amp setup, if for no other reason than hauling gear. To get better band balance, though, I plan to go through FOH. But I want a __better__ sound FOH, if I can possibly get it. I have yet to find strings that hold a good timbre & sparkle past 6 jobs, maybe it's just cheap strings I pick. Now to the reason for posting: I'm willing to buy one of those amp/cab modeller / effects boxes (w/ or w/o expression pedal). If I run my 1-15" Roland combo amp + my 1-15" Hartke combo amp on stage just for stage coverage, and go through a preamp out through a modeller / effect box for FOH, can I get a __substantial__ improvement in my sound? Meaning, partially, can these modeller / effect boxes make up for dying strings, but moreso, is there enough audio modification at FOH that it makes the modeller / effect box worth it? Thanks.