IMO, the 35, 43 and 50 are all too close to each other. Is there any particular reason you dislike zooms (measure-bating doesn't count as a reason btw
)?For portrait work, you really only need 2 lenses: a wide and a tele.
What I'd recommend for people starting out would be a solid budget kit:
Kit lens as your wide-normal (best lens IMO for flash/daytime shooting)
Rokinon 85mm as a tele
Maybe a sigma 30 if you find yourself needing something fast and wide-ish
The k-30 would be a sweet, but I gotta throw a vote for the k-5 if you know how to take advantage of the 14-bit RAW for on-location work. If you want to shoot professionally at some point, you really should shoot with dual-bodies, partly for redundant backup, partly for not having to switch lenses so you can work faster.
In the end though, the best lens for you will occur to you as you shoot more and learn more about your style. The kit lens and a cheap 50 is a great place to start, I say you really should just stick with that for a while until you find the difference between lenses you'd want and lenses you need. My own experience is that lenses come and go as what you shoot changes. I've gone through my fair share of lenses and had the luxury of owning a huge kit of lenses at every focal length at one point, I've found that keeping things simple with your glass lets you focus more on what in front of your camera rather than what's on it. As it is now, I've got an UWA for about 20% of shots, I've come back to the kit lens for around 50% of shots and I've got a canon FF body for shallow DoF and around 30% of shots.
hope this helps and best of luck!