If sailing offshore (beyond the sight of land) is your thing, then a full keel boat (that is more likely heavier than its finned keel counter-part) has a more sea-kindly motion and is probably safer. It will take longer to get where you''re going, but you are more likely to arrive, and when you do you''ll be less stressed out than if you had sailed there in a lighter, but faster boat.
If the heavier boat does 6 knots on average, and the faster boat does 8 knots on average - a 1000 mile journey will take about 7 days in the heavier boat and just over 5 days in the lighter/faster boat. Based on this example, is getting there almost two days sooner worth the harsher ride? Only you can answer that for yourself.
As I was once told, when sailing it''s ok to make plans, but don''t make schedules. ;^)
~ Happy sails to you ~ _/) ~