I am an SPSS Base user, and I'm ready expand my capability by buying a bunch of SPSS modules (Exact Tests, Conjoint, Forecasting, etc.). The price, however, is daunting. XLSTAT is about half the price and offers techniques that SPSS doesn't like TURF Analysis. I work in a medium-sized corporation doing market research. Should I switch from SPSS to XLSTAT? What are the issues I should consider? All opinions welcome.