Since dropping the 504, Remington only has the Model 5 manufactured by Zastava. It is not available just everywhere yet. Anyway, the current crop of affordable bolt guns is pretty much limited to Ruger, Marlin, Savage, and CZ. Winchester has a fairly inexpensive import from Zastava called the Wildcat, but it seems to be scarce in my neck of the woods.
I would say, at the risk of starting an argument, that the CZ rifles are the best bang for the buck with the others following in various order. The Ruger 77/22 is a quality looking instrument, much more refined looking than the Savage and Marlin entries, but all of them can be made to shoot well. Pick the one that strikes your fancy, you can't really go wrong. You may have to tweak any of these rifles to get the best performance out of them, but that's part of the fun.
The Charles Daly Superior II and the the Remington 5 are the same basic rifle. The Toz 78 is the basis for the Winchester Wildcat. I think the Toz is still available, but the Charles Daly version of the Zastava rifle is not. You might find some new ones still in the pipeline.
EJ