ORIGINAL: Phoenixangel
This is the one that had all of the issues brownout lockout stuff.
The radio was recalled just after I got it, had it back in less then 2 weeks. It was really good service I got email updates on everything. I have never once had any issue with it. Everyone says use a 6v pack for the rx but the 4cell has been fine for me.
I think if you keep a close watch on your battery voltage under a load you will be fine, I have been. Once I NEED to go 2.4 I will be happy I have the DX6i.
Phoenxiangel, you are absolutely right. The big brown out issue has been resolved and found that it was caused from old batteries. I wish I could remember the magazine it was in, I want to say AMA's, but anyway it was found out why and taken care of. I have a DX7 and have been using the 4v 1500 mah and a 4v 600 mah (only for longer flights) Y'd to the receiver and a voltwatch. I have had absolutely no problems at all. You don't need a 6v until you get into the bigger planes and using all of those high torque/digital servos.
As has been pointed out this will go on forever and ever and ever. Pick what you are comfortable with and like yourself.
Joe