This is the easiest choice of the group:
How about an old school Skilter 400 with a lift pump?
They are cheap (people would probably send them for free) and they have been proven to work.
If not how about:
>$400 ATB hang on, WM x150 series
~$300 MSX 200 with pinwheel
The ATB and WM are both well built, reliable, and the companies have great customer service.