The Dior Homme suits I saw were canvas front, and I recall seeing someone here or on AskAndy mention that they had a rather high quality maker (not Isaia or Kiton level, but say, a little above mainline Zegna level). Of course you're paying a substantial premium for the label, but I think if by some small chance you find something you like in your size on deep discount it wouldn't be a bad deal.
Dior - interesting styles, great cuts, will fit only a minority of men, European, Asian, or American. It used to be priced quite moderately (suits at $1200 - I had the opportunity to pick up a tux at half that at a Barney's sale a couple of years ago), but prices have been jacked up recently due to popularity. Not really worth my money - I prefer Costume, which fits me and suits my style more - but that is just personal preference.