Red-
Did $4200 include the price for the block, crank rods etc., or did you already have those parts and just pay for the machine work? If that is a price for all parts and machine work, you got the deal of the century, and in that case, let me know where you got it form because I'll order one too- seriously.
As to your other statement about ERA costing $10-15 more than a CSX roller to complete, I can tell you from recent experience that you are way off the mark. I got a complete roller from ERA (the only options I did not get were the larger front brakes and ERA rear) and had the car painted by one of the painters that ERA works with and the total price, including paint, was probably not more than $2500 above the advertised price for the CSX roller. And for that difference I would buy the ERA every time.
Someone asked why a SPF or an ERA, well I can tell you that ERA quality and service are second to none. ERA is truly one of the best comanies I have ever dealt with and that would make me buy an ERA over a CAV CSX every time, even if the ERA is nominally more expensive (which I'm not convinced that it ultimately is.)
My .02
