In order to keep cases in "prime condition" you'll want to take hard consideration for annealing them after every firing. And as far as a press goes, I highly recommend the Forster Co-Ax press as it makes for easy swapping out dies and not having to worry about case holders that might effect how the cases are sized. The Co-Ax can be very helpful when starting out experimenting to see what works and what doesn't.
In any case, you might find the following helpful to you in decided which single stage press really appeals to you most:
ultimatereloader.com