Some like the BOSS, but I liked the Line 6 better when I tried it. My favorite was actually the Korg ToneWorks AX3000B, but then I'm not a big multieffects guy.
i had the 3000b and have the 3000g (korg). i burned the b out with the wrong ac adapter (doh!) so i use the guitar version. with some eqing etc, i like the 3000g better. has ring mod, and talkbox, which the b doesnt have. pretty affordable as well. claypool uses the 3000b. : eyebrow:: o sorry got carried away.