I own both an RS-A1 and an FR64S. The RS-A1 is really excellent, but it is also a bit crazy in terms of its ergonomics. (You need a steady hand or a shot of cognac.) The FR64S is probably superior for a low compliance cartridge, in terms of both performance and usability. You should be able to buy an FR64S in excellent condition for well less than $2000. If possible, find one with silver internal wiring. (The arm tube will have a label: "Silver wire inside", or similar.) Most have copper internal wire, which is probably OK too.
If cost is a major barrier, then you might consider the RS-A1, or one of many other good vintage Japanese tonearms that can be had for $1000 or less.
If cost is a major barrier, then you might consider the RS-A1, or one of many other good vintage Japanese tonearms that can be had for $1000 or less.