Nope.
Most of the people holding, are doing it based on wishes and hopes; more than actual information. There's only one rumor of a redesign and that rumor only said that they were going to tone down the use of the 3D and probably rebrand it and nothing else. Yet, because of the analog-add-on (that the same site posted the rumor; but came fro a different source) people now expect a redesign with the analog, 4 shoulder buttons, longer battery life...smaller and cheaper than the current model. That could be announced any moment from now...to never.
A redesign is probably in the cards, heck it is expected..but if you're going to hold on it and wait for games you want to play; based on the possibilities of what it might include you could be waiting a long time. So you might as well just get it now, and when the redesign is here, trade it and pay for the rest..if you feel it's worth it. For all we know the redesign could be just a bigger 3DS, with a matte finish, more SD Card/memory...and nothing else.