What size top box for a fzs600?

[stevierst]

I've had a few different size boxes over the years (ooh-er missus!)

Had a 29 litre on my tdm which was as much use as mudflaps on a tortoise! You can just about fit one lid and a pair of gloves, that's it! Got a 35 on my thundercat, and for me that's ample, but again, only one lid and a few bits n pieces.

My last fazer had a 45 litre Spada which was huge, and 2 lids could fit.
It all depends on what you want it for, personally I'd go for a 40, any bigger and you find yourself putting loads of crap in it, and risk overloading the rack.