Hey Todd,
I guess it comes down to what you need to know - you know the max amperage, available waveforms, some of the ranges, but a lot of detail is missing as usual - and an unconfirmed delivery date. My worry would be what is the real date for a unit that has been fully tested?
You thinking of keeping the 250ext? That would be an orphaned machine whose value would depreciate like a stone.
Cheers,
Mike
