Harbeth compact 7 ES3 for a large room ?

Newbie here and need some help. I am planning to set up a separate audio system in the basement just for music alone. I have a large L shape room not divided, with about 12' W x 35' L x 7' H.
I have been using an old Rogers LS/2 bookshelf and are used to the British sound, this plus my music taste makes me consider the harbeth, which I had a chance to audition lately. I listen to many kinds of music but mainly classical (from solo piano to chamber music, concertos and large orchestra work), also some instrumental/new age, vocal, Pops, etc. Not many rock music.
Source: i'm fully digital and use a Squeezebox 3 with lossless files on server. Amp:not decided maybe another thread.
BTW, is there a limit of number of words for the post ? Thanks !