I have a cateye strata double and a vetta vl110, both wireless w/cadence. I prefer the vetta but its probably harder to find these days. your budget is 8-900. can you assemble and tune a bike out of a box? if not your lbs will do for about $100. these are plenty of bike to get started.

http://www.bikesdirect.com/products/...ntnoir_xii.htm
http://www.bikesdirect.com/products/gt/gtr_series2.htm
http://www.bikesdirect.com/products/...strada_xii.htm
http://www.bikesdirect.com/products/...rvus_al_xi.htm
http://www.bikesdirect.com/products/windsor/fens_xi.htm
http://www.nashbar.com/bikes/Product...98_-1___202339