and
Orion. If you can give some idea of your budget we could offer better directed ideas.
As for the LX75, yes from what I understand there have been a few issues with the newts and schmit-newts on the LX75, but from what I understand its more a problem with movement arm (the length of the scope) rather than the weight. If your considering imaging as well you might consider an sct on the LX75. Same scope optics as on the LX90 and LX200. It will have less of a problem in the movement arm department than longer newts. Having said that you will probably still have to do a bit of tweeking and adjusting to get the mount suitable as a stable astrophotography mount.