I have not decided yet. :P
Although at the moment I'm leaning more towards 40MHz for the following reasons:
- My current transmitter is a KO, so I have a few pairs of crystals. (receiver too)
- I don't like the antenna sticking out of the back.
- Last but not least: 40MHz is proven technology and I yet have to see one of the world class drivers use the 2.4G. If 40 meg is good enough for them...
I realize that there is no such thing as buying the "wrong" option in this case. Both are great sets and that's what makes it so hard to choose.
2.4GHz takes away the worries about free channels. But then again if you have 3 sets of crystals chances on not having a free one are very very low.
I will probably purchase mine in one or two weeks so I will have a good thought about it.