Those numbers are exactly the same as my RPMs at those speeds. I don't think you have anything to worry about. We see all kinds of different mileage ranges on here, varying from model to model and with different total car miles. I'm sure my tranny is slipping more than it used to, but I get roughly the same miles per tank as you do, maybe even a little worse. I'm no gearhead, but I'd also guess that with a properly-functioning FPR you could expect some different numbers than with your old one.
All in all, it sounds like your SE is running pretty normally.
1997 SE w/SLE package
"White curse? I think it'* more like.... WHITE FURY!" - MyLittleBlackBird