Andy - a few notes here for you:
1) You have both the Pz.III Ausf. K and Panzerbefehlswagen III listed as separate entities - I don't believe that's the case. The Pzbflswg.III IS the K variant.
2) If you list the "Sturmgeschutz III Ausf G 10.5cm" as the "SturmHaubitze III Ausf G" there won't be any confusion vs the 'regular' G's.
3) What exactly are you calling J vs J1 in the III list? Are you just going with Long vs Short barrels as the distinction?
Heh...I've actually got more Pz.III - based stuff in the closet...was only listing the ones that hadn't already been taken. Between the IIIs and IVs, I kinda went nuts collecting all of the different variants so that hopefully one day I could have them all on the shelf!
Ideally I can build both a straight III and a StuG platform - why don't you put me down for the artillery spotter Pz.Beobwg.III Ausf H (DML kit 9030) and Wittman's StuG III Ausf A (DML kit 9031).
I shouldn't think you'd have any problem finding someone to do the StuGs in B, E, or F - should be readily available. Minenraumer I'm not so sure about. The Su-76i needs a conversion kit, unless someone comes out with a fresh boxing in the next year (highly possible!).