i've bought a blackstar dstx or how the hell it's named their metal distortion... very very nice. my amp is a bugera 333xl and i love it, i bought the pedal to have more tonal choices. i'm using it like a "soft" lead channel... gain level and overall tone is very similar to that of my amp, with ISP turned to british (blackstar pedals have got the option to emulate american or british tone), but the head itself is more punchy and "full"... if you don't like your amp distorted sound it can be an excellent solution, but "real" preamp sections are better, in my experience...