New to dac/cd transport concept

I'm new to breaking up the cd player and dac into seperates. Some seem to love the results, While others don't. My question is if I use my marantz 8260 cd/sacd player as a transport and marry it with a very good used dac of the 1-2K range used will I gain anything?
Also will I still be able to use the dac w/sacd's,or will the dac have to be sacd capable. Have no expierience with this type of setup if the questions sound stupid.