I just got a Helios recently.
Was going to buy the M8 but I read about the release of M11 on the very same day I was going to get the M8. Phew!!!
So, I changed my mind and got the Helios instead. Costs about 15% more than the M8(bought with servos) but I have to say I have no regrets.
It has loads of features and the manual is as thick as a small magazine. To me about a week to read and get to know all the functions. Navigating is not a problem coz it allows me to program 2 custom menus.
The feel is better than M8 or 3pk. (my opinion only) It does not feel as heavy. In fact, it is almost as light as an entry level TX. And the weight balance is good, not top heavy. Plan to get the larger grip pads and wheel extension. These items should make the Helios feel even better...
Get the Helios and save the rest of the money to get a Spektrum.