The sunroof models actually have more strength in the roof than the non suroofs due to the roof bracing etc that's in the roof for the sunroof. The non sunroof ones are very flimsy, espcially with no roof lining in, but then there's barely anything structural about the roof anyway tbh.
The topaz (light blue) one linked a few posts above was a very good buy IMO, and i was very interested myself only it was snapped up very quickly!