Fiddy,
You can find 54's at a reasonable price if you are patient. There was one on here recently that was bedded to a McMillan that went for $950.00. I really wanted it but one of our homosexual members got it first. Oh well.
Also, DIP is making 75MOA rails for them right now. If you are planning on getting a 54 I'd go ahead and order one now. I put one of their 25 MOA rails on my sitxty-foe and it's pretty bad ass thus far.
Travis