With my Canon PRO 100, which is, I believe, the successor to your printer, I have been pleased with these papers:
- Canon Pro Luster
- Canon Pro Pro Platinum
- Ilford Galerie Prestige Smooth Gloss
- Ilford Galerie Prestige Gold Fiber Silk
- Ilford Galerie Prestige Gold Mono Silk (B&W only)
- Canson RC Satin
- Canson Gloss and Hi Gloss
- Canson Platine (B&W only)
- Canson Rag Photographique
- Red River Arctic Pro Satin
Particular disappointments have been Canon Semi-Gloss (has a kind of veiled look) and Canson Baryta which has, as you noted, a rather small gamut and dull look to it. I have tried a few other Baryta or Fiber type Glossy papers and found them equally disappointing except for the two Ilford ones in the list above. The other exception is Canson Platine which doesn't work well in color but sings out gloriously in B&W.
Having now gotten used to my new PRO 100, I intend to use primarily Canon Pro Luster, Ilford Smooth Gloss and Canson RC Satin. I will also have on hand Canson Rag Photographique and Canson Platine. While pigment printers work well on fine art and rag papers, it is harder to find good rag or baryta papers for dye inks. On the other hand, dye works really well on RC papers.
After such long windedness on my part, may I suggest that you give up on the Canson Baryta. If you're printing B&W, try Canson Platine or Ilford Gold Mono Silk. If you are printing color and don't want an RC paper, try Ilford Gold Fiber Silk or Canson Rag Photographique.
BTW, I had one piece of Canson Canvas. The PRO 100 nailed it in a single print and it looked really nice. Don't know if you (or I) want canvas, but it's nice to know that canvas (at least Canson's) works well.
Sorry for the long post.