Y-Anchor + Almax Immobiliser III

[NooBish-AbbZ]

New bike soon ( once i've got my Mod 2 passed) which won't be small enough to fit in the garage so am goign to get another ground anchor and am going to treat myself and the new bike to a larger chain :p

I'm looking at the Y Anchor and Almax Immob. Series III (probably the 2m) + Squire SS65CS lock.

Simple question, will the Y anchor be big enough? or would i be better going for the Y-max?

Also, anyone with a gsf650 bandit or an SV650 (pointy) with the III or IV could you post about length of chain you have and where you secure it round/through your bike? thanks