definately get something better than the type r's. theres alot of better sounding splits (to my ears) at that pricepoint -and obviously above.

youre really limiting yourself to wanting no amp or sub, but thats a compromise youre willing to accept.

with your requirements the "best setup" would probably be an efficient 2-way splits or 3way splits that includes a 7-8-9" MID-woofer (not subwoofer) that plays down low to cover some subbass without distorting & bottoming out earliar, but then you wont be doing them any justice and let them shine clearly without an amp.. nothing comes to mind when i think of efficient splits that also sound decent..

even less justice if your aernt willing to add some sound deadening.

personally i reckon get an amp. most of em are only a few kilos, add some sound deadening and the head unit and itll all still be under 10 kilos, hardly noticeable. doesnt have to have 100+ per channel either, just a 40/50ish-RMS-per-channel amp is enough. itll definately help you out in the "clarity" department, but you dont wanna go that route so not much you can do really..