If i bought a TBS disco I was considering these parts from various uk suppliers and Hobbyking :
DJI ,Tiger or Sunny sky motors ?
DJI Esc 30a Or Simon k ops
Turnigy 4S 4000mah or 4S 4500mah or 3300 mAh 3S
9.5 graupners props
Naza lite with GPS
Turnigy 9xr with orange RX And module.
What do you reckon
I have Sunnysky motors, they're great and seem to be everyone's favourite right now.
ESCs go for anything that can be flashed with or comes with SimonK firmware. SimonK>*
Batteries I use the Zippy compact 4000 4S on my Disco and they give a good balance between duration and keeping the quad light.
Instead of Orange DSM2/DSMX I'd get a FrSky module instead, widely regarded the best module/protocol upgrade for any radio.
Flight controller - I wouldn't get a Naza but that's personal choice, they aren't bad, I just prefer the APM. Also, if the latest news regarding Colin Guinn is to be believed then DJI are a rather unsavoury company who I wouldn't want to give my money.
Good luck