The Holmer family owns The Race Place. Long time race parents, and really great to do business with. I've found them really helpful over the years. They'll do things that others sometimes won't....go pull the stock and measure it for you over the phone, etc. Scott is the owner, Connie is his wife. Son Eric was a great speed skier at the Nor-Am and Europa Cup level and is now teching for Errol Kerr, team Jamaica.
As far as fit on the various brands, they all vary. Spyder tends to run a full size smaller. Descente is more true to size. In some cuts, Karbon is generous. But it varies based on the fabric, padding, etc. Best if you can try it on in person, which is hard. But, a good on-line shop can help you. Worst case is that they ship you one size, and if not right, you return it to exchange. I've has some people hold the other size, in case it's needed. In other situtations, I've had both sizes shipped with the understanding that I would return the one that didn't fit right away. Normally, if I haven't had a prior relationship, I've paid for both sizes and been credited for one upon the return.
Race Place, ARTECH, RaceWerks, SRD, RRS.....all can be helpful over the phone.