Replying to Mtn Bike Disk Brake Help

Looking for help purchasing hydrolic disk brakes since I haven't been following new bike technology/products since I bought my bike in 2005. I'm looking to get new disk brakes since the ones I have now (Hayes HFX-9) are pretty fucked up.

I have a Kona Coiler Deeluxe, am 5'2" 110lbs and ride a mix of XC, Downhill, DJing and freeriding. Mostly trail riding though.

What would be a good hyrdolic brake for me that isn't a bank breaker? Not looking to spend more than 350 total.


P.S. I'm in all the mtn bike cults but they're all dead.