Umm - all of the parts that you menation are pretty interchangable with any standard 1911 (ie..same exact design no matter the company that makes it). 1911's are maybe the most modified/changed up guns out there - so many different parts makers that spare parts will not be an issue with either guns.
One difference between the two you mention however, would be the extractor. S&W uses an external extractor (ie.. you can see it on the outside of the slide). Springfield and most other 1911 makers use an internal extractor. Neither would be better than the other from a functionality standpoint, but some 1911 "purists" cannot stomach an external extractor. It just comes down to looks really for this (or it does to me anyway).
I have a Springfield loaded. I have put a good many rounds through it (over 2000). It has been flawless. I have put a good many parts changes or upgrades to it as well. These include: MSH to add magwell (and remove the Springfield ILS), EGW barrel bushing, flat trigger, full ignition group (C&S super match trigger group - hammer, sear, disconnect, sear spring, MSH spring) and various grip changes. Right now, in process of changing out the sights to go to a plain rear with wide notch and FO front. You will have no issues with any parts you need (but that said, you will not have any issues in this regard with the S&W either).
I have no experience with the S&W E-series. Except reading about them & they seem to be excellent guns. They are hard to find around these parts. I have only ever seen one in person at a LGS. This would be a tough decision for me if both were in front of me (and I had it to do over again).
Hope that helps....
Last edited by bartwatkins; 04-18-2012 at 05:26 PM.