I think it depends on what goal you are trying to accomplish is and the size of your listening room;such as being able to reproduce eric clapton laying down some tracks in the recording studio or a live presentation of a full philharmonic orchestra; 2 very different goals in which the equipment and cost of will very greatly in my opinion.
how much would you say a good set up cost
ok, we all have gear, but now days, what price do you think you have to spend to have a real good system. not over kill, just good equipment, good sound stage. all around mid to mid high. I'm saying at least 30-35 thousand gets you in that level. I was talking the other day with some friends and we never put a price on our gear. you always get this piece now then that later. but have you ever sat down and figured out just what you paid for your system. I was shocked when i did it.