welcome to diy.
the first step is to define your performance criteria and your budget criteria.
what spl (105, 115, 125, 135)?
what configuration (2 way, 3, 5, 7, 9)?
what size room (cubic feet)?
what frequency response ('flat' to 40, 30, 20, 15, 10hz)?
what aesthetic contraints (don't mind 15-18" drivers, or do you want minimally visible speakers like little bose cubes)?
if you need help spec'ing out your performance criteria, that is cool too. we can help with that.
but, if you have some idea of what you want, it will be a lot easier for folks to suggest a system.
here is an analogy. i love motorsports. if somebody shows up and says, "i want to go fast". the first step would be to try to quantify what he means by fast. quarter mile et, trap speed, lap time? high winding lightweight motor and car or big heavy torquey car? one guy might end up on a motorcycle, another guy might end up in an s-class amg. both are "fast", but are totally different animals. not too many motorcycle guys care about the color of the burlwood dash. not too many s-class amg drivers care about hit 0-60 in less than 3 seconds. the key to choosing your drug is to define the high you seek first. ;-)