I went to the ISA show in Orlando yesterday... several imported lasers (no G Weike), and of course the big three US companies - ULS, Epilog, Vytek. I got some quick prices, the Chinese companies were asking about twice what the going rate seems to be, but they were getting a lot of interest. Looking at the others, I'm still pleased with mine... there was a company called Kaitain whose machines I liked, nice knife bed design on that one.
They were all cutting little acrylic things, and I kept thinking their edges were nicer than mine. So I came back today and experimented. The trick seems to be going very slow, cutting without the paper on, and using little or no air assist. I seemed to get more striping with my usual 20 psi of air. The dogs (Clumber Spaniels!) are 3/8" and 3/4" samples.
Amusing / scary: I was talking to one of our vendors in their booth, and kept thinking "I smell laser". Sure enough, about an isle over was one of the Chinese companies. ULS and Epilog had these massive filtration systems running, the importers were running with the lid open and no exhaust. Argh!