It's a tricky one, as it could depend on how well the Blu-ray player in question is handling the video processing (as well as your set). What player were you planning to get? Could you borrow a mate's PS3 or player to see how it fares?
To be honest, with the HD player situation in such a mess (HD DVD in trouble; Blu-ray players still frustratingly incomplete in terms of spec) if you don't have to buy right now, i'd wait and see how the new season's players pan out - we'll be reviewing as many of the new machines as we can in our April issue, out the first week in March.
In the meantime, i'd stick with your current DVD player - for all the compatibility issues with your Samsung, it's still a solid player, and your TV has a good scaler, too.