Hi David,
So your budget is $1100-$1600? I have not heard the Clearaudio, but own the Linn and have heard the Rega and VPI. While the Linn could be set up very well, I think the VPI is the best sound for your money.
If you wish to play 78's, I think the VPI is the only one that will work for you, providing that you buy the SDS motor control (and you may have to have a VPI with a different motor than the Scout).
Good luck,
Mark