OK, a Grand Symphony Spruce/Mahogany - very nice!
First suggestion is Martin Retro Monels - they work well with Mahogany.
Second suggestion - I haven't tried these - Curt Mangan also do Monels but these are round-cores - might be a nice combination.
By sheer coincidence I swapped a set of those JP Pure Nickels with a set of Sunbeams on my maple H&D just last week!
The Sunbeams are great but I'll go back to the JP's when I next change strings.
