I have a Springfield Armory M1A standard that was made in about '89. It came equipped with all USGI parts excepting the receiver, and has proven to be an accurate, reliable rifle. I fire only surplus NATO ammo and have never had a malfunction. Ejection consistency is amazing - it just keeps on chugging those cases into a 9" circle, fie feet from the shooter, right at 2:00 o'clock. The SAK '69 chrome lined barrel is capable of all the accuracy I can muster with open sights, about 2.5" at 100 yards (though I'm sure the gun could do much better). I bought this one just last year, on consignment for $900. It had seen very little use before I got it.
If I were looking for another one, I'd keep my eye peeled for an older, slightly used SA M1A in the 40XXX-80XXX serial number range. These were made when the supply of USGI parts was plentiful, and these rifles routinely come with most or all parts (sans receiver, of course) of USGI manufacture. I have no concerns whatsoever about the durability of the SA cast receiver. The LRB Arms forged receiver may be better in absolute terms, but the SA receiver is plenty strong enough, IMO. I'd think a shooter would wear out several GI chrome lined barrels before causing any meaningful wear to the receiver.
HTH,
vanfunk