whales

I've been gong through all the whale watching charter sites I can find out on the web and now my head hurts. Boats range in size from 30 feet to over 100 feet. Tour size ranges from 6 people to over 50. Tour length ranges from 3 hours to 9 1/2 (with a one hour stop).
Also, there are at least 5 or 6 charter boats that are the first and/or only boat to be currently using biodeisel.
If any of y'all have ever been to Seattle & gone whale watching, which charter company did you go with? And would you recomend them?