Originally Posted by rattleheadmegadeth
youll love the EC1 if you like the g400/mx518.
The EC1 may be better for you, but not everyone is going to agree. Personally I found the EC1 was too large. Even the EC2 eVo feels bulky due to the flanged right side. The bucket shaped buttons also means no comfortable position to rest the ring finger. The G400 provides an excellent grip with its indented right side and good slant.
Everyone with a large mouse collection will give you the same advice - find a good sensor with a shape that fits you perfectly and buy a few spares. Never upgrade