I cannot find any major difference between C3850 and C3650 (I don't think the stack backplane speed difference matters, fixed vs modular uplink won't matter neither). And that makes me wonder which one I should choose to cover my needs (data, PoE voice, etc, etc) to have the investment protected. Not quite understand why Cisco introduce two product lines which are so close, and make me think which one Cisco will kill. Are you having, or had you faced the similar dilemma in the past? Could anyone give me a suggestion? Which would i to choose,3650 or 3850? Thanks.