ECHOs are fine saws and Huskys are on par with STIHL but the truth is you are never going to see a 20-30 year old ECHO sell for the same STIHLs do. My local STIHL dealer sells 90s era mid range pro saws for more than a new ECHO.
STIHL is number one in chainsaws in my opinion, but there are some good Echo & Husqvarna saws out there and in most circumstances they hold their own. You should never compare a Stihl to an ECHO. Echo makes some great saws, but the comparision is like saying a Honda is the same as a BMW, the scale is way off.
A lot of people look at a STIHL and see the price first and don't even consider the quality. Then they see that they only give you a 1 year consumer warranty, factory defect only. ECHO offers a 5 year consumer warranty, also factory defect only. However, you can purchase a 6-pack of the STIHL ultra synthetic oil blend to extend it to 2 years.
But those are just numbers and a saw that is used day in day out is going to have problems. But, you can limit them. Make sure that you do not run it with a dull chain since this will kill any saw. Don't overheat it (limb it). And no matter what you do, always make sure that you use good quality fuel and keep up on maintenance.
Fuel is a biggy. And that is why the warranty (anywarranty) does not cover fuel related issues.
No matter what saw you choose it is important to invest in proper safety gear. Make sure you read the manuals, and watch and talk with the pros that you can find before you get to work. It can be exciting to get started, but you're never fully prepared.