Seat post choice for my Coker

[uniShark]

Hi: I've got a Coker Big One, but the seat post had been cut down and is a bit too short for me. I'm considering my options for a longer replacement post.
The two extremes are an aluminum seat post from Coker, or a KH seat post. I'm considering the KH because I might eventually replace the seat with a KH seat. I know a KH seat can be mounted on the cheap post from Coker (I tried it to be sure), but the Coker post doesn't have as broad a base on the bottom of the seat as a KH post does. The Coker seat will also fit on a KH post, although it's a tight fit, and might require slight filing of the edges of the KH seat post base (I got far enough to be confident it can be done, without forcing it all the way on).
I don't anticipate any real extreme riding on this uni - if/when I get that far on a 36, I'll end up buying a KH 36.
So, any reason not to just go with a cheap and light Coker aluminum seat post, even if I eventually may put on a KH seat?
Thoughts appreciated. . ..

Edit: My experiments were with an adjustable KH seat post, although the one I'm considering would be non-adjustable. I assume the holes and seat base platform are the same on the two KH posts.