how to save the data of several user registration form ?

hi everybody
in my solution exist several registration form for example : enroll in eshop, enroll in reservation hotel and etc... .
i must save the each enroll data and registration form for next process and purification data 
i want process the registrant information by diferent kind of search.
which ways exist for save information of these registrant users?
save all data in database or save all data in Profile group of asp or save in both some of them in db and other else in Profile?
is exsit any other way that better of above ways?
thanks for your help me.
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