Apparently the following information on the upcoming Criterion edition of "The Gold Rush" was recently posted on the Criterion website. It looks promising. The newly recorded score for the 1925 version sounds very promising.
From the website (http://www.criterion.com/films/27565-the-gold-rush):
New high-definition digital restoration of the 1942 sound version, with uncompressed monaural soundtrack on the Blu-ray edition
New 2K digital transfer of the reconstructed original 1925 silent film, restored in collaboration with the Cineteca di Bologna, with a newly recorded version of director Charlie Chaplin’s score, presented in 5.1 surround DTS-HD Master Audio on the Blu-ray edition
New audio commentary for the 1925 version by Chaplin biographer and archivist Jeffrey Vance
Three new programs: Presenting “The Gold Rush,” which traces the film’s history from original release to rerelease to 2003 reconstruction and features film historian Kevin Brownlow and Vance; Music by Charles Chaplin, featuring conductor and composer Timothy Brock; and Visual Effects in “The Gold Rush,” featuring effects specialist Craig Barron and Chaplin cinematographer Roland Totheroh
Chaplin Today: “The Gold Rush” (2002), a short documentary featuring filmmaker Idrissa Ouedraogo
Four theatrical trailers
PLUS: A booklet featuring an essay by film critic Luc Sante and James Agee’s review of the 1942 version
The release date is June 12.