[Faster]

You'll have to do some investigation... some Beneteaus, esp US built ones, may well have lead keels. In point of fact the 'bolts' (actually studs) on a cast iron keel might be changeable much more easily than any lead keel, depending how they are installed. Many are threaded into threaded holes the main keel body making individual replacement, even afloat, a 'possibility' if necessary - something not do-able with the typical cast-in 'J" bolts of the typical lead keel.

IMO an iron keel is not a deal breaker provided it's been looked after and properly sealed and protected from oxidation.. any visible rust upon haulout is not a good sign.