I don't know about the dolmar, but my 2188 had almost all I wanted which is why I got it: Husqvarna 390 at a discount, outer rim sprocket, good power to weight ratio, I like the 3 setting oiler which does about either 1/3, 2/3, or >1 tank oil per tank of gas. Only down sides are parts availability, I wish it had an upgrade filter like the 372, bigger spikes would be nice, and it had trouble keeping a 42" bar oiled well, I'd say 32" max for decent oiling. I'd also like to see more heatsink surface area, it gets pretty hot, and the exhaust blows right up the handle which about burns my hand.
I'm very happy with my 2188 and Echo 271t setup. The only thing that would be better is if they were ported and had light weight bars. I'd quickly get another 2188, I gave up a good 660 I had to get mine.