We introduced the ARF kits few years back. It came with KK2.X controllers, they were great but with times changing and new controllers coming in the market KK2.X started loosing its charm.

Now most of my suppliers are stopped supplying KK2.X boards. As per them the cost of production of board is higher than selling cost (compared to other better boards)

So now we would soon start getting a new set of ARF kits but it would not have KK2.X controller. Hence wanted to know which of the FC is better but almost easy to use (compared to KK2.X board).

I would appreciate if you can leave a comment too along with your vote. 

For GPS kits I would recommend either the APM or Pixhawk/ Pixhawk mini with M8N GPS. I have not used the Naza myself so I can't comment. For non-GPS kit the Naze rev. 5 is good option (rev. 6 has some issues) but I prefer the XRacer F303. It is good to see that the QK kits are moving with the times It is one of your kits that gave me a start in this hobby. I would also recommend upgrading the ESCs in the kits. ESCs like the DYS XM20A/ XM30A perform much better and are smaller and lighter as well. Especially for kits with APM/Pixhawk ESCs with a BEC are not necessary as we use the power module. I found a massive improvement in the flight performance of my Reptile 500 after changing the ESCs.

Thanks for your inputs, about the ESC.

I understand that the esc which comes with the kits are very old. I agree but then adding the DYS or LittleBee would increase the costing by much. And the ESC that comes with this kits have pre-soldered female bullet connectors which is another plus point.

I would take your suggestion as input for sure

I really hope we get to see some LHS stock up on some F3 FC for racing. such as LUX f3 FC, Kiss FC and X Racer f303 FC

X Racer F303 available at
http://www.rchyper.com/x-racer-f303-flight-controller-v2.html

@vibranthobbies since when!?! Thank you for stocking them!

It is available from the introduction. But, in small quantities.

KISS FC, i will worship the LHS that gets it!! its great to see rchyper get X-racer!

@Rathi
there was someone in the forum saying to stock kiss fc (and other thing such as kiss 24a , rs2205 , se2205,etc)
but now he is gone

Check with the OP of this post
http://www.rcindia.org/chatter-zone/kiss-18a-escs-emax-rs2205-2300kv-little-bee-20a-king-kong-5045-props/