Hi
There are many diffrent brushless motors, but most people find Hacker to be the best.
the split is/should be a fast plane...
I used a Hacker B20 12L 4:1 with a APC S 9x6 prop in many speed 280/300 applications with amazing results!
430g thrust, flight times of approx 7min useing 8x720Nimh
the B20 12L can be sued on 6-10cells, and would fit your Split 280... and also it fits Mini Laser 3D, MPX Stuntman, MadMax, and may more... even the big Su31 3D! where we get up to 1kg of thrust! pretty good for a 73g motor
I recomend useing Hacker/Master 30A ESC.
B20 12L 4:1 €135
ESC €96
Happy hollidays and good luck from Sweden