So i guess the engines i should take into consideration is as nominated:

#1) Novarossi 528 modded
#2) RB 928/728
#2)LRP spec-3 / Z.28R 8 ports
#3) SH .28 Prospec 8 ports
#4) .30 STS
#5) .28 Ofna engines
#6) .28 OS engines

most of: http://www.amainhobbies.com/index.php/cPath/1_23_79
What else should i add to my 'wish list'?

Great buggies:
Kyosho
8ight
X-Ray
CEN
Hyper 8
Jammin
MBX5R

Radio: Nomadio Sensor