I need to invest in a quality drill bit set. One set for Masonry, one for Timber, and one for Metal. The latter can be cheaper as it will be used least often. I'll be using these primarily with my cordless 18V BHP452 Makita drill/driver using Lithiom-Ion batteries. They will be occasionally used with a wired Bosch. What manufacturer do you recommend? I've had a look over at D&M Tools but the choice is so vast I have no idea what to go for. I don't mind paying a bit more for quality that will last and rather a drill only set (as opposed to one that comes with pliers/spirit levels/etc.).