pentax dslr questions

[ellenfl]

i have a pentax-m with a 50mm pentax lens (manual focus), sigma 28-80 af mini zoom macro and a tamron 70-300 af zoom. i understand that these these lenses will work on the *ist ds.

will any of the aforementioned lenses take the place of the kit lens and be as good or better for macro/close-up pics? if so, should i buy the body only?

tia

ellen fl