Springfield Pros are at minimum the equal of the other semi-custom brands, or at least traditionally have been. Since Springfield's latest restructuring and changes made to the Custom Shop, there are lingering questions about build quality and some perceive an uptick of complaints in the recent CS builds.
I'd feel perfectly comfortable getting a Springfield Pro. The rub as JM44 correctly notes is there's no customizing a factory new Pro, but if its stock configuration suits you, you're good to go.
My own personal caveat with the sale you mention is that it's a Government-sized 1911 in 9mm; I'd prefer a lighter slide to increase reliability with the lighter 9mm loads, but they can be tuned to run.
$2000 is a remarkably good price if it's well-preserved -- do your function and visual checks before closing the deal.