I use a SkyRC D100V2, wich is good for the price and has a built in power supply. If you use external power supply,you can charge at 10A for each canal (100wx2, 200w total). If you use internal power supply, the power is 100w (total). It also has battery resistance meter, usb exit and bluetooth control. The only limit is...the limit: charge at 10A, discharge at 2A.
By the way, Hitec X2 Black Edition is a SkyRC rebranded.

For the same price (a lil bit more expensive, but achiveable) , I'd suggest iCharger X6. Great product. In my local clubs, 80% has an iCharger.

It depends on what you need. If you need a charger for multiple purpose, SkyRC is good for the price. But If you into "hard racing", especially touring and buggy stock class, I'd suggest iCharger. Hard cycling, hard performances, short battery life