Hi Ryan,
Excellent choice, and welcome to the 1/48 crowd, a small but hopefully growing group.
From your list, I’d say whatever takes your fancy. [:)] Personally though, I’d say this about some of them:
Tiger I 501st Africa (technically not a part of the Deutsche Afrika Korps, the 501st PzAbt fought in Africa but was never part of the DAK per se, just a historical tidbit [;)]): Should be a fairly easy build. I’ve just done a regular Tiger I and it came together quite easily. Since it’s an African version you can do it in one color as well, so no intricate camo pattern, and concentrate on the weathering.
Hetzer (38)t: Small, nifty little thing with not so many exterior details. Could be good to cut your teeth with. I’m doing one of these as one of my next builds. It’s got a three-color camo pattern, but could be brush painted, I guess.
Pz III Ausf L: Again, this could be made as the African (DAK!) version, in one color, saving you a lot of painting time. Again, a small little tank.
I imagine the Sherman doesn’t have much detail to it either, making for an easy build, as well as being in one color only.
As for figs, Tamiya do three box sets of German figures, each including a couple of tank commanders and some soldiers. There’s one with early troops in action, one with early troops at rest and one with late war Panzer Grenadiers. These sets are quite good IMHO, and adding a commander or crew figure to your tank will enhance it no end. There’s also a box of American troops, as well as British and Russians.
You can check on http://www.1999.co.jp/eng/plamo/ for instructions for all of Tamiya’s kits (select Tamiya on the top left) and you can see what’s in each troop set box. Quite handy to know before you buy.
Any other questions, just ask.