Ah, the listening season - chestnuts roasting by the Atma-Spheres, Ken-Rads nipping at your nose. I love it.
Also love the Sibelius suggestion - a little Swan, or dare you bear yourself away on Symp 4 - i'd say go 'under the ice' but I hear JS glaring at me 'aye aye there is *no* program'. (Makes you think of nazz nazz, eh?)
For something different, how 'bout holing up with some smaller group lighter stuff, Hobbit music from Holst ('Fugal Concerto for Flute, Oboe and Strings' or the delightful 'St.Paul's Suite') EJ Moeran ('Music for Cello & Piano'), John Ireland ('The Holy Boy', 'Mai Dun'), topped up with a big one, say Finzi's sumptuous 'Intimations'. Dig through those Lyritas you haven't played in a while - lottsa tiny gems in that catalog.