Need Help with picking a radio

[Scottyy15]

I have been looking at the MULTIPLEX PROFI TX16 $2000, Spektrum DX18T $1000 and Flysky FSI-10 $350 Or is that something better. I don't want to spend the money and it turns out to be ****. I don't really need all the channels but would like them for future

The Flysky FSI-10 the main reason I like it is you can have two trucks/etc on and drive one then switch to the other model on radio and drive that one without turning one off then the other (if that makes sense). I don't know if any other radio can do that??? I have only had flysky which you couldn't do until the new It4 and FSI-10.
http://www.ebay.com.au/itm/Flysky-FS...t_11300wt_1238

Spektrum DX18T
http://www.rcplanet.com/Spektrum_DX1..._p/spm2810.htm

MULTIPLEX PROFI TX16
http://www.modelengines.com.au/retai...f_cat_id=AOAAB