The 1000w unit looks very interesting- high voltage 3 phase output at just 200 rpm.
http://www.ginlong.com/wind-turbine-pmg-pma-permanent-magnet-generator-alternator.htm
Hmm think it would work with this?
http://cgi.ebay.com/Pelton-Water-Wheel-Aluminum-Generator-Power-Projects_W0QQitemZ190376086097QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2c534c8a51#ht_500wt_1182
I suppose flow and head would be needed to know? Say 40gpm @ 80ft head.