I'm doing the same thing, starting with the Nutball. I was actually waiting for the parts for my Tricopter to arrive from China and got hooked on the build videos. I had ordered the Turnigy 9x and got impatient, so I ordered the HK 6 channel from the US warehouse. The 9x beat it by one day.
For the price, the 9x is nice. But if you just need something to get started, the HK @$29 and here in three days, can't be beat.