I was in the same position as you a little while ago and reckon it's best to buy good quality tools rather than cheap ones as it'll cost you more in the long-run anyway when you have to replace broken stuff.
The only tools I have which I used to build my bike and look after it are; large adjustable spanner from a DIY store, set of allen wrenches (long-handled allen keys), chain whip/gear tool, wheelnut spanner (which has a bottle-opener on it so there's a saving!) and a chain tool. Although I did get a crank-puller too as I needed to get the old crank off my bike.
Allen keys maybe then? ;-)
I was in the same position as you a little while ago and reckon it's best to buy good quality tools rather than cheap ones as it'll cost you more in the long-run anyway when you have to replace broken stuff.
The only tools I have which I used to build my bike and look after it are; large adjustable spanner from a DIY store, set of allen wrenches (long-handled allen keys), chain whip/gear tool, wheelnut spanner (which has a bottle-opener on it so there's a saving!) and a chain tool. Although I did get a crank-puller too as I needed to get the old crank off my bike.
The allen key set I have is this one: http://road.cc/content/review/48473-one23-hex-key-set
HTH