All 3 of the top Russian prospect goalies look great, but lots of other concerns come with them. Will they come to NA? (Islanders have been trying to bring over Sorokin.) Will they adapt to the North American game? Will they hold the threat of bolting back to the K if they don't get the contract they want? Will their year-to-year play be wildly inconsistent? (see: Varlamov, Bobrovsky)
Based on what I've seen/read/heard, I'd rate Samsonov the highest for pure skill. But because of the above, I'd probably rather have Demko than any of them. Guess we'll find out eventually.