Since you are interested in Piano Concerto / Piano Sonata / Concerto for Two Pianos and Orchestra, here is a list of other items that you may find interesting.
Bartok: The Wooden Prince
Bournemouth Symphony Orchestra, Marin Alsop
[ Naxos / CD - released 29/Mar/2008 ]
"Alsop and her orchestra do justice to Bartók's most overtly romantic large-scale score; it's a performance that will surely appeal beyond the ranks of Bartók devotees to balletomanes generally." (Gramophone)
Rautavaara: Piano Concertos Nos. 2 and 3 / Isle of Bliss
Laura Mikkola (Piano) / Netherlands Radio Symphony Orchestra / Eri Klas (Conductor)
[ Naxos / CD - released 16/Oct/2006 ]
"Laura Mikkola sounds perfectly attuned to the character of both works and exhibits a wide-ranging, impressive technique..."
Dies natalis / Farewell to Arms / 2 Sonnets
James Gilchrist (tenor) / Bournemouth Symphony Orchestra / David Hill
[ Naxos / CD - released 10/May/2008 ]
"James Gilchrist's singing is guided by a refined (yet passionate) sensibility, just right for Finzi, and his voice has substantial reserves of resonance and power." (Gramophone)
Piano Concerto No. 1 / Symphony No. 1 / Midsummer Ale Overture
Peter Donohoe (piano) / Royal Scottish National Orchestra / David Lloyd-Jones
[ Naxos British Piano Concertos / CD - released 3/Oct/2007 ]
This recording should help to re-establish [Gardner's] reputation with two relatively early works written in the post-war years, the Symphony No. 1, "a superbly crafted work... by a subtle and imaginative orchestrator" (Paul...