For anyone needing to buy tools I would suggest getting a set of metric box wrenches 8 mm to 19 mm, a set of metric 6 point sockets same sizes, 5 and 6 mm allen sockets, a swivel ratchet, a 3" and a 6" socket extensions, a medium phillips screwdrive, medium and large flat blade screwdrivers and then individually buy your specialty sockets and/ or box end wrenches
22mm, 27mm, 32 mm ( or 1 1/4") and the 17 mm allen socket and a torque wrench ( if you are not confident on tightening fasteners)
I buy most of my stuff at Sears, or Harbor Freight but some specialty stuff I order from mcmaster-Carr.
http://www.mcmaster.com/