Thank you all very much for your input, much appreciated! I have edited the post to add the appropriate finds now that I am home.
Suz, you absolutely MUST get this suit! Or at least try it on. The pants are strangely sized XS, S, etc. These are M, and are huge on me, they are sitting much lower than they should, there is at least 5" waist gap. S would be on an normally slouchy side, and XS properly fitting, I think.
As I said, I do not think I can justify the full suit for myself, but I will think about it. The jacket would work great with my wardrobe, as I have plenty of jeans etc. to dress it down. However, I have an old-ish raspberry ponte jacket, that is nowadays rarely worn. Hmm, I guess I need to post a photo of that one for comparison.
The dress, well, I really love the idea of it, but it has to fit right!. I do not mind body con at all, but it might be too tight. I have already sized up to S, but I guess next time I will try M as well. Diana, you are absolutely right about the armholes. When I pinched the dress to see how the altered neck would look like, I had to lift it up some as well. So no decision on it till I try M and consult with a tailor.