Stihl a strong first with Husqvarna an increasingly distant second. Husky's quality has ready dropped from its Electrolux (and now Poulan) days. I know that people don't like to hear it, but you often really do get what you pay for. And Stihl's after-purchase service is second to none.
As far as specific models, the Stihl MS 250 is plenty of chainsaw for most homeowner needs.