ballast

well my ballast blew today i know it was coming but i thought i would have more time to get a new one and look around so i need some help.
im thinking about getting another magnetic ballast becouse it lasted a long time from 2000 to today, and i hear digital ones only last like a year or 2 and they cant run CMH light that i know of. but im thinking of one still because then i can get a 600 and run that for flower and 400 for veg but cant use a CMH. weres the best place to buy a ballast online should i forget the CMH and just get a digital or is mag the best still? what brand is best what type is best and best price to buy and were

Lumatek Digital Ballast. 600w Dimmable, you can run 600w 400w 360w on the SAME BULB. I dont do it cause why? the more the better but I can make my 600bulb run at 400w or 360.

thanks i was looking at one of them in the store by me but did not know if they were any good