pinion for my setup?

[Jabe]

I have Hyper ST Pro chassis and im running it with KD36-74-06XL 2800kv motor and 2x 4S 4800mah lipo in parrel and Mamba Max.
Spur is 52t, so which pinions i should choose to run with this motor/setup? Mod1 but what size?
I might try Feigao 540XL - 7XL 2400kv as well, would those pinions work with both, or do i need more?
Are those Novak Mod1 pinions good as Robinson Racing's or RC-Monster's Mod1 pinions?

[Arct1k]

http://scriptasylum.com/rc_speed/

Differential Ratio: 3.909090909090909
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 11
Battery Voltage: 14.8
Motor KV: 2800
Tire Diameter (inches): 5.8
Top Speed (MPH): 38.6943 MPH


Differential Ratio: 3.909090909090909
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 13
Battery Voltage: 14.8
Motor KV: 2400
Tire Diameter (inches): 5.8
Top Speed (MPH): 39.1968 MPH

Mod 1 extra hardened and as this is mike's place I'd have to say RCMonster pinions...