well of course a spoked core will not be a strong as a solid core. However there is no way you will break a vert x wheel. So it does not really matter what you choose. My freind had his vert x "mags" I think its called for over a year and they still work great.
i have vertx 110 mags and they only problem ive had with them is that they seem to be wearing down a little fast. ive had them for almost a month and they're already down to about 100. oh, and i broke the bearings that came with them in like a week.