ORIGINAL: Mr Cox

The HFS-06MT is a fullrange (or extra long range as they call it) receiver. I have two that I use in smaller stuff (.10 and down) and it works very well.
The HFS-05 is more parkflyer stuff that one should be careful with, some come with a very short antenna wire.

For a .40-.60 sized plane there is no reason to save on every little gram though, so you might as well use something larger.