As jocelyn has already said, quality individual pedals beat the crap out of any multi-effects any day.
That said, G2.1u for 5k is a steal. However, make sure the processor sounds good to you. It doesn't to me. To me it sounds digital, like Satriani's tone. Mind you, I love that guy's skills, I just don't like his tone. There's no room for expression with a tone as flat and digital as that. Guess satch never believed in "tube-breakup" :-)
My gear, currently up for sale
Washburn X-16 anarchy - SOLD!!
duncan pickups - I wonder why Im selling these.