If you fly BNF models, then going with the DX6i can be convenient because the recommended settings on how to set up the radio is found in the manual.
However, don't fall into the trap of thinking it's a better radio just because it cost more. It doesn't even come with backlighting in the LCD.
I would troll Craigslist if you want a DX6i. I see it become available from time to time for $100.
From the leaked specs, the forthcoming 9xr looks like an ideal first radio. Will do everything a newbie needs and more. And when you want to spend money in the future in more expensive radios, I think you can easily sell and still come out ahead. But I warn you, you might like the flexibility of the open firmware too much and there might be no turning back after that.