I want another heli, and i think i want a trex. but i would like to know from you guys about their quality. or they problematic? do they fly better than walkera?

and about how much should i pay for a TREX 450 xl with

Spektrum DX6 Radio and Receiver 4 s75 servos
Kontronik Jazz 40-16-18 ESC brand new
3 HS-65 MG Hitec metal gear servos brand new
4 HS-55 servos
Futaba GY 401 Gyro brand new
Medusa MR-028-032-3400 motor brand new
DN POWER Balance Charger
Common Sense 2100 pack brand new
Apex 2100 pack brand new
Phoenix RC Flight Simulator
Assorted Spare parts
Large Align Case
Small Align Case