Tiger barbs rock. I prefer the albino variety myself. I had great luck with them. I still have only 1.5 years of fishkeeping under my belt, so I'm still a rookie really. When I was brand new though, I quickly found out that these were one of the few fish that survived my first tank. First tank was 29 gallon with about 30 juvenile fish in it. Wasn't properly cycled either. I was just asking for trouble. The tigers held up the best it seemed.
And yes, they are fin nippers. Keep them in groups of six or more to help, and don't put any fish in with really flowy tails like bettas or something.