idk much about 2 stroke i just know i have a problem with my jet i think it should be bigger than a #210
With your mods, you'll indeed need a bigger jet. Get a 290 and tune from there. You'll blow your engine if you keep running a 210 main jet.
Now back on topic, its hard to beat a Trinity pipe. I have one and and love it. Toomey pipes are also a good bet. They seem to be the best-built pipe on the market, and they rip on a stock or ported stock cylinder.
I haven't personally run a DMC pipe, but most of the reviews of them I've read have been positive. I DO have firsthand experience with FMF pipes, and they're good down low and in the midrange, but sign off early up top. If a DMC pipe performs similarly (some have compared DMC's performance to that of an FMF), then it would be best-suited to trail/play/MX riding where bottom end and midrange are most important.