Those look good.
I'd prefer the M113A1 (available in 1964) personally, for my gaming, since the M113A2 didn't become available until 1979, or thereabout, if Wiki is correct:
http://en.wikipedia.org/wiki/M113_armored_personnel_carrierThe A-1 variant would cover me for most of the 1960s and 1970s (1964 - 1979+, and perhaps well into the 1980s, I suspect, in some cases).
Would love to see a M113A1G as well (West German model), with the smoke dischargers on the front as well. Perhaps that could be offered as a simple add-on item, along with a MG3 machine gun, instead of the M2.
Also, the US (81mm and 107mm) and West German Mortar (120mm) variants, and the M150 TOW vehicle, too.
Any news on the M60 tank becoming available soon?
I recall seeing a prototype of that some time ago, and need at least a platoon of those as well.