The HP ratings on the tags at the store are a little lower than comparable models. The 20" saw is 56.5cc and produces 3.9hp. A Dolmar 5100 produces more HP at $80 less. The 18" is 3.2hp 51.7cc. You can get a Husky 353, Dolmar 5100 and do better than those numbers.
Not even mentioning that this would be a big boxstore purchase and there is no service after the sale. I would rather support my local dealer.
Before it was Stihl and Husky now you bring Dolmar into the mix, I'd think the Dolmar 5100s is the best buy in the chainsaw world if you know how to tune a saw. Seems like the 353 Husky cost more than the 51cc Efco and is NOT built as good and most likely has less power in real life. Over here my 49.6 cc Echo cuts faster than my 53cc Rancher 55 and we all know Echo's have no power. Steve