+1 Dolmars feel a little flimsy and awkward to me. Personal preference I guess.
I always felt just the opposite LOL Jonnies esp in the 50 cc range have always felt flimsy like they would tear in two if you pulled or leaned too hard on them.
I didn't find the Dolmars I ran to be flimsy, but I found them incredibly awkward. This is especially true on the larger models. With the bent handlebar, it forces your left wrist into an awkward position if you're holding the saw (correctly) to the right side of your body, and the angle increases the chance of the saw pivoting back toward you in the event of a kickback.
But worse, they become "heavier" as the day goes on, particularly with a long bar. Why? They don't balance as well. With your thumb pivoted back toward the middle of the saw, you don't have the same leverage you do with the handlebar further out. Last time I used a 7900 was after a long day of sawing. I went to lift the bar to shift it to a new cut on the log, and wondered why it took so much more effort than my 2171. I picked up the 2171, and it was instantly apparent. My wrist was in a better position to lift relative to the bar, and the pivot point for the handlebar was further away from the engine. Think of a lever...is it easier to use a lever if you're hand is nearer the fulcrum...or further? Twisted in relation to the axis of the lever, or perpendicular? (Before you answer that one, remember it is the thumb side of your hand which has the greater strength...)
Guys that run Jonnys usually do so for reasons of ergonomics...they just seem to feel better. It's easy to understand once you've used one, but tougher to explain on paper. So if you've got equal power/weight/build-quality/price/etc., that's what it comes down to. Jonsered puts a lot of research into ergonomics, and it shows. They're just a better design ergonomically than the Dolmars/Huskys.
Of course, your mileage may vary.
