I have a G sys and Line6 M13. I use the M13 the most, have it on my board next to my GCP. see my avatar
<<<<<<<<----------- the M13 is quick and simple and i run it through loop 7 of my GCX switcher. the only thing I dont like is it only lets you use 4 effects at once and you cant change the effects with a midi controller "YET!!!" since I have had it, they came out with an update and more effects so im sure they will fix the control of effects with an external midi pedal soon. Do have 48 banks with 12 effects on each bank and each bank could be a song or effects used for a style of music. Also tweaks like a stomp pedal and the delay types, mutron wah and other effects also sound top notch.
The TC G sys is an awesome pedal or rack mount and has the TC quality effects but is a pain to tweak and program. Takes a while to get it down. You can use a laptop and USB to program your effects which makes it easier.
Sorry if that just confused you more. I would go Line6 M13 at $400 over TC G sys for $1200.
