I currently have an NAD T742 driving B&W DM603 S3 in the front and B&W DM601 S3 in the rear. I would like a bit more power and need more SVideo inputs. Given that a number of dealers are blowing out 752's, I am wondering on opinions if this is a good option. $$$$'s are an issue.
I have been very pleased with my T742, no issues, and am not worried about some of the reliability issues folks have talked about.
I think the reason no one has responded to your question is that really, you are the only one who can answer it. Not to sound harsh or anything, but you are the only one who knows exactly how the T742 sounds at your home, you are the only one who knows your financial position, and you are the only one who knows what your input requirements are. Both the T742 and T752 are excellent units and both would serve you well for many years. In the end, it is totally up to you whether the benefits of upgrading outweigh the extra cost.