Hola Nico, yo acabo de montar un ZMR250, te puedo ayudar en lo que quieras, estas son las piezas que fui comprando:

– Chasis ZMR250 de 5mm de grosor http://www.banggood.com/SM-ZMR250-250MM-Carbon-Fiber-Frame-Kit-with-5mm-Frame-Arm-p-1032124.html?p=9L18057432271201611T
– Motores Racerstar Racing Edition http://www.banggood.com/4X-Racerstar-2205-BR2205-2300KV-2-4S-Brushless-Motor-2-CW-2-CCW-For-QAV250-ZMR250-260-Multirotor-p-1066837.html?p=9L18057432271201611T
– Variadores Racerstar V2 30A http://www.banggood.com/4X-Racerstar-RS30A-V2-30A-Blheli_S-ESC-OPTO-2-4S-Support-Oneshot42-Multishot-for-FPV-Racer-p-1074733.html?p=9L18057432271201611T
– Hélices tripala 5030 http://www.banggood.com/6-Pairs-Gemfan-5030-3-Leaf-CW-CCW-ABS-Propellers-For-ZMR250-QAV250-280-180-RC-Multirotors-p-1007095.html?p=9L18057432271201611T
– Controladora CC3D http://www.banggood.com/OpenPilot-CC3D-Flight-Controller-STM32-32-bit-Flexiport-p-937044.html?p=9L18057432271201611T
– Placa PDB http://www.banggood.com/CC3D-NAZE32-F3-Power-Distribution-Board-PDB-With-Filter-BEC-Output-5V-12V-3A-for-QAV250-p-1023543.html?p=9L18057432271201611T
– Batería http://www.banggood.com/ZOP-Power-11_1V-1800mAh-3S-45C-Lipo-Battery-XT60-Plug-p-991825.html?p=9L18057432271201611T
– Cámara FPV http://www.banggood.com/Runcam-Swift-600TVL-2_8MM-Lens-DC-5-to-17V-Horizontal-Fov-90-Mini-FPV-Camera-PAL-p-1044126.html?p=9L18057432271201611T
o si vuelas más con poca luz esta es mejor http://www.banggood.com/RunCam-OWL-PLUS-700TVL-0_0001-LUX-FPV-Camera-FOV-150-Wide-Angle-F2_0-lens-IR-Blocked-5-22V-p-1057924.html?p=9L18057432271201611T
– Transmisor de vídeo http://www.banggood.com/ImmersionRC-Tramp-HV-6-18V-5_8GHz-1mW-to600mW-Video-Transmitter-International-Version-p-1088990.html?p=9L18057432271201611T
o también http://www.banggood.com/Eachine-ET526-5_8G-40CH-25mW200mW600mW-Switchable-FPV-Transmitter-p-1075702.html?p=9L18057432271201611T
– Emisora y receptor http://www.banggood.com/FlySky-FS-i6-2_4G-6CH-AFHDS-RC-Transmitter-With-FS-iA6B-Receiver-p-983537.html?p=9L18057432271201611T
o también http://www.banggood.com/RadioLink-AT9-2_4G-9CH-Transmitter-With-R6DS-PPM-PWM-SBUS-Output-Receiver-Mode-2-p-1100776.html?p=9L18057432271201611T
– Cargador http://www.banggood.com/SkyRC-iMAX-B6-Mini-Lipo-Balance-ChargerDischarger-SK100084-p-929890.html?p=9L18057432271201611T
Otros accesorios que me han servido:
– Soldador http://www.banggood.com/Mustool-MT223-60W-Adjustable-Temperature-Electric-Soldering-Iron-with-5pcs-Solder-Tips-p-1077119.html?p=9L18057432271201611T
– Estaño http://www.banggood.com/0_6mm-Tin-lead-Solder-Wire-Rosin-Core-Soldering-2-Flux-Reel-Tube-6040-p-985802.html?p=9L18057432271201611T
– Termorretráctil http://www.banggood.com/328pcs-21-Polyolefin-Halogen-Free-Heat-Shrink-Tube-Sleeving-5-Color-8-Size-p-969574.html?p=9L18057432271201611T
– Conectores tipo banana http://www.banggood.com/20-Pairs-2mm-Gold-Bullet-Banana-Connector-Plug-For-ESC-Battery-Motor-p-996354.html?p=9L18057432271201611T
– Bridas http://www.banggood.com/1000pcs-2_0x100mm-Black-White-Nylon-Cable-Ties-Zip-Ties-p-957232.html?p=9L18057432271201611T
– Adhesivo http://www.banggood.com/Strong-Permanent-3Meter-Double-Sided-Super-Sticky-Tape-Roll-For-Vehicle-p-1002947.html?p=9L18057432271201611T
– Cable USB para emisora http://www.banggood.com/FlySky-Data-Cable-USB-Download-Line-For-FS-i6-FS-T6-Transmitter-Firmware-Update-p-982289.html?p=9L18057432271201611T
– Balanceador de hélices http://www.banggood.com/Magnetic-Propeller-Prop-Balancer-Carbon-Fiber-for-Quadcopter-p-971486.html?p=9L18057432271201611T
– Bolsa de seguridad para Li-Po http://www.banggood.com/Li-Po-Battery-Explosion-Proof-Safety-Bag-Charging-Sack-18x23x6cm-p-1017484.html?p=9L18057432271201611T
– Tiras para batería http://www.banggood.com/5-PCS-Eachine-Battey-Tie-Down-Strap-22_3cm-p-1029680.html?p=9L18057432271201611T

Esos variadores para mi son los mejores en cuanto calidad-precio, y no tienes ningún problema al elegir ningún motor ya que los ESC son de 30A con 35A de pico y aguantan muy bien cualquier motor. El tema del mando y el FPV ya es a tu elección según tu presupuesto, espero que te haya servido de ayuda!

Hola javier, yo acabo de montar un drone de carreras y me ha salido baratísimo, si quieres contacta conmigo y hablamos sobre piezas o lo que quieras 😀