A good 3/4in drive socket set will probably cover all your needs. If you need some larger 1in drive socket for that "Special Ocassion", its probably cheaper to just buy that 1 socket, unless you repair for a living. The other things to consider would be, LARGE wrenches. Alot of the hydraulic fittings require larger wrenches that are not included in the automotive type wrench sets (Over 1in in size). Another handy tool used by me more times than any other, Channellock 20 1/4in. Tongue & Groove "Big Azz" Pliers. Great for removing LARGE thread on filters.