Yes, it is a valid option, when you amortize those bux over the lifetime of the equipment. Considering the productivity gains of a 6100 vs a 455r, ditto good payback.(In fact, the 455 is NOT a "homeowner" saw- it's a cut or two above that.) I ran a 455 for years, got it at a great price as a factory refurb from VMInnovations. Then I tried a Dolmar 6100, and it was true love at first cut. It literally turned circles around the 455, and it's only gotten better over the last year as it's broken in. So, yeah, I got a whole spitload for those few extra bux. And a bud really likes having that 455, a huge step up for him from his Stihl 250, which he recently sold. Win, win.
In a bunch of contexts here, the Dolmar is an excellent value.
Those new Echo/Shindaiwas are very nice, for the price. Relative to my values, the 6100 has them covered. Yes, I've tried them side-by-side. The version of the 59 cc Echo you'd likely most want, the CS-620P, goes for ~$100 more than the Dolmar 6100- reality check.
Where'd you get the "50% more" re prices? More like 28%. Value judgments involve a whole set of metrics, which are often personal. Football & chainsaw metaphors? C'mon.