Tunebite LAME settings

I am new here, and still experimenting getting my Napster stuff into MP3 format. What I’m trying to do is simply convert the files to MP3 with minimal loss of quality from the 128KBS WMA they started out as. I am using Tunebite with Razor Lame. I have Tunebite set to 192KBS MP3. I set up Razor Lame for 192 KBS VBR with a quality setting of 3. I really don’t want the file size to get all that much bigger than it was in Napster. So far, these settings seem to work generally OK (but not perfect), and the file sizes have grown about 30-50%. Anybody have any suggetions for LAME settings for what I’m trying to do?