Thanks for all the suggestions. The 45 has my attention because of the sub-sonic loads, large bullet and I already have a 1911 in 45. The fewer calibers I have the better.
The sterling link in my OP is really one that got my attention but it's pricey. I thought the Mech Tech upper would fit the bill but at 7lbs for an upper...I don't know?
Anyone know of another model in a 45 cal with similar plane jane "pipe style" look and reasonable costs?