I can't comment about the quad copter side, I have only messed with a plane. Have been thinking about a quad copter, it sounds like maybe I should move quickly. But I'm more interested in the long distance/long loiter aspect overall.
Anyway, I have a 9X transmitter and would highly recommend it. I haven't had an issue with range, including the time I got in over my head... The 60" wingspan plane was a speck and I could only determine orientation by how it responded to the controls.
One thing that made a world of difference was installing the ER9X firmware. If you don't mind playing with electronics it shouldn't be too bad, basically buying a few dollar programmer and soldering some wires on a ribbon cable to processor pins to program (and later configure through a windows app, if you don't want to do it through the transmitter screens). I have no background in R/C (this was my first ever radio) and the factory setup was very limited... The controls have specific functions (exponential on/off, some channels are tied only to switches, etc), which I guess is what the R/C guys are more used to. My background is embedded systems (PIC, 8051, ARM, etc) and I wanted to be able to fully customize all of the controls to channels on the receiver. The ER9X firmware let me do that... And is a lot more "polished" than I expected from an interface standpoint.
I have the knobs and switches set up for: flaps active (switch), flap angle (knob), throttle inhibit (switch), throttle at "cruise" (switch), flight stabilizer (gyro) off/2d/3d (switch), flight stabilizer gain (knob), elevator to take-off position (basically up elevator trim added) on a switch (allows me to hold radio with left hand, thumb on throttle, and throw the plane with my right hand). And I'm not using a lot of features the firmware has...
It seems like a great radio, I can't believe how inexpensive it is for the features it has. The RF section is a module, and can be replaced with other bands if desired also.