There is no cheaper new kite better then HQ Apex.
You may want to look at used Montana or used Ozone kites.
But, when new, HQ Apex is the most you can get for not too much money.
Radsails Evo2 may be cheaper,but is not as good as HQ Apex.
I have experience with:
HQ Apex II
HQ Apex III
HQ Neo II
HQ Montana 5
Ozone Access XC and XT
The Apex III? Is that any different than the Apex II? Better? Worse?