Here is a very descent basic tool kit that will work well unless you are going to do frequent major over-hauls:
http://www.performancebike.com/shop/...tegory_ID=4218
I bought this kit a few months ago to replace my bottom bracket. Just the cost of the Park Tool bottom bracket and pedal puller at the LBS would have easily exceeded what I spend on this entire kit. I also got the pedal wrench (a lot of time "normal" wrenches are too thick to fit properly) and put it to good use. The only thing I've heard about the kit that might break on me is the chain whip. Some people complained about the tools not fitting right, but I have not found that to be the case. For any normal nuts and bolts I'd use a proper 6 sided high quality socket set that I have so maybe that is where they have problems.
My theory is the buy the tools when I need to do a job. I needed to replace the bottom bracket so I knew I needed specialty tool for it and the pedal extractor. That made this kit worth it all on its own. I don't foresee having to replace that more then every other year, maybe even longer. My original bottom bracket was some mistory brand. Hopefully with a quality Schimano unit in there I'll get a few years of use out of it. At some point I'll need to get a good cable cutter, but that will come later.
Happy riding,
André