in the german spectroscopic forum I found a note on an article in Nature about a Be black hole binary HD 215227. After seeing the excellent spectra of Nova Del 2013 here down to mag 11, HD215227 seems a feasible object for an echelle spectrograph. It is a known Be star with the additional highlight of a close companion with a period of 60 days, resulting in Doppler shifts of about 30 km/sec. For those interested in that object here the link to the article in Arxiv:
http://arxiv.org/abs/1401.3711
Looking carefully it should even be possible to see the accretion disk around the black hole (He II at 4686A).
Maybe a new project, while the Nova has faded in the twilight. A closer inspection may even reveal more unexpected compaions from other Be stars
Martin