Hey Kent.
I looked at the Schulze and the Orbit. They are almost identical in capabilities. I got the Orbit because it was available immediately through:
http://radicalrc.secure-mall.com/sho...t=57&cart=7817
It was $182 shipped. That is the version without the PC interface, I think that model is $20 more. It's beautifully built and I am planning on buying two more (I have 2 A4's too, but like you, wanted field charging capability). I wouldn't order it directly from Germany, with shipping, it's about $40 more. I had it from Dave in 3 days.
I get all my battery stuff from Dave (radical rc). He can send you the cables you need too. I think you will be happy with either. LMK if you have anymore questions, or just post here.
Bob