they make both types in the nexus hubs, w/coaster brake and without, tho ive never actually seen a nexus w/o a coaster brake myself. your lookin at bout $100 tho, ive got 2 bikes with a nexus 4 and they have been flawless as of yet. (nexus 4 is discontinued BTW) they still make em in 3, 7 & 8's i think, you can find S/A internal geared hubs, theres alot more of them around w/o a coaster brakes than with em tho, also a shimano 333 but they were kinda on the cheap side (price & quality at the time). the other thing bout the nexus is there really wide so if you use one be prepared to spread the rear stays.
this is just what ive picked up in the short amount of time ive been back into bicycles, im sure others can advise ya better.