Ian,
I'm not sure how Bose systems are marketed in Russia, however, in most other nations they have a fantastic return policy. If you do not like what you hear, you have 45-days to return the system for a full refund--no questions asked. You may want to check into that policy and see if it is in effect in Russia.
Good Luck,
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)