Hey,
@matemike! Welcome to the TreeBuzz forum! I think you are going to like it here.
First let me say that I'm not a pro arborist like many on this forum, so take what I say with a grain of salt.
The first thing that jumps out at me in your post is that it sounds like much of the work that you do will happen while having both feet on the ground. My understanding of things is that having a rear-handled saw is more appropriate for that type of work because a rear-handle saw provides more control and stability than a top-handled saw. I get the impression that the top-handled saws were created as a concession to the needs of climbing arborists who often have many limbs in close proximity to each other, and therefore less room to maneuver a saw. Eliminating the handle at the back allows them to get the saw into tighter spaces, at the cost of some stability. You might want to consider the purchase of two saws, if you can afford it; one for ground work that might be a little larger in size, and one for in-tree use.
The other thing that occurs to me is the question of safety when trimming palm trees. I've never even seen a palm tree in real life, but I have seen quite a few videos about guys getting crushed by them when the fronds suddenly flop over on a guy. Not sure how this happens, but you should go on YouTube and look for videos on this subject to try to learn more about it.
Also, working from a ladder to trim trees can be a very dangerous undertaking, as the many videos on YouTube on this separate subject can show you. Cut limbs will frequently swing down and into the very ladder a cutter is standing on, knocking it out from under them and sending the cutter to the ground.
I don't consider myself to be an unreasonable person or an alarmist type of person. I'm just trying to give you a heads up about possible hazards you can run into while doing the things you are proposing to do. Trying to avoid a blindside accident.
As to the Echo chainsaws, I managed to buy one of their 330T chainsaws before they were discontinued, just because it had a good bang for the buck appeal, and at the time was readily available to me. I don't need to use it often, but it has been reliable for me, so far. Most of the cutting that I do can be done with a Silky hand saw. If you don't own one of those, too, you should really take a hard look at them. Amazingly sharp, very light weight. I can fairly easily cut a 1&1/2" or 2" diameter branch with these things. I have also cut six inch diameter limbs with a Silky saw, but it probably took me 15 minutes to do it.
Good luck in your hunt for the perfect saw!
Tim
P.S. I just did a search and found this as a place to buy the Echo 2511T in the USA. Here's the link.
http://www.baileysonline.com/Chains...saws/ECHO-CS-2511T-25cc-with-12-bar-chain.axd