I'm sorry nobody seemed to have got back to you on this subject, as I am learning Russian at home on my own and have been using Colloquial Russian 1. Have found it good in many ways - there are always flaws in any system/book - but overall have found it good and so have now bought Colloquial Russian 2. I would have liked to have known if there was anything better out there - there seems a real dearth of material for this level. It would be good if some of the publishers out there saw this and did something about it!!! If you have found something in the meantime - please post and share
Kind regards