First off I havent used any of these but for a start I wouldnt be buying a Zaffiro as it is still a Non HX machine for more $$ than a a couple of the entry level HX machines. You are paying top $$ for what is fairly much a blinged out Silvia. A much better buy on price and features will be the new Gee for a lot less $$.
Best thing is to go play with some of the machines at one of the sponsors and go through the differences or deficiencies of the machines in your price range.
Good luck :)