Antihero wrote: I'm still not big on the wet soil taste you get with most them. ...
I'm looking for some sheng that's sweet, smooth and clean tasting.
If you are looking for what you described, i would not recommend what you listed. (I have a similar cake, with cheaper material - it ends up brewing up like red tea more so than puer) For that price you can do a lot better.
Do you mind astringency? If not, go for something from Nan nuo shan as an introduction. For that price, you can pick up a pretty decent cake with a good 5 years or so on it.
If you are just getting into puer, you might try something that is a well known blend, something like 7542 that is "classic".