Hi,
Im in the same situation. I have a few sheets of Satin pro left, but not sure what to do next. I've tested most papers from Harman, Hahnemuhle, Innova, Permajet and Ilford and found the Harman Gloss Bayrta to be the best of these, but IMHO its nowhere near as good as HP's Satin Pro, which is a superb paper.
I haven't tried canson baryta photographique though, which gets very good reviews.
Cheers
Anthony