where to buy dry gear?

I am looking to get a drytop/pants combo, I was told the stuff at EMS/REI wasn't good for whitewater/playboating.
now if REI doesn't have something like that where else could I go? thats the only place I can think to check.
I'm in Salem Mass on the northshore, anyplace in decent driving distance I could check out? And what should I look for in whitewater gear vs recreational stuff?


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