I found that the Chicken of the VNC was a good program for the mac, but when I logged into my PC using the Java viewer, it seemed to work much better!
So I downloaded the Java version of Tight VNC and wrote a little applescript wrapper to type in the hard stuff into terminal
You would normally go to the terminat and type in something like this:
java -jar 'NAME OF VNC JAR FILE' host 'IP ADDRESS OF HOST' port 'NUMBER OF PORT'
I wrote a quick applescript that asks you for the port, ip address, and runs the java jar file for you (it assumes it's in the same directory)
If they every improve upon tight VNC, or you find a better VNC program, all you would have to do is copy the 'OSX Run VNC' program to where your new VNC program resides.