Have you checked hobbywing, these are the same ESC's as the SP ones just with different branding, apparently they come from the same factory and can use the same software. You could be saving a fortune, they also do other models that may be of interest.
They do a 120A version of the SP that I believe is the one you are after. The 60A version will run down to a 5.5t as long as you don't use advanced timing (ok I wouldn't but it was something that made me look into other options). Just thinking before you splash the cash it's worth researching. I'm going to be doing more research next month as with the mid motor 22 it's all about space and cooling etc.
Just food for thought, don't think you can go too far wrong with the LRP and SP ones, and maybe the backup might be a bit better then Hobbywing.
long short, I'm just recommending you look into this option.