Like BC_Programmer said,
The CD quality usually isnt high enough to rip that high. Your a bit obsessive if you do that...
Most people dont have the sound card to play and hear the difference, and if they do have a sound card that can, they often dont have the speakers. ("High Definition Sound Card" doesnt always cut it, since, the company doesnt define "high definition", and by speakers, I dont just mean loud, I mean well built).
Not to mention, the human ear cant tell the difference.
I prefer to keep my music at around 320KBPS, there was a time when I had VBR at that rate, I think.
Due to 40GB of music taking up my computer, on a 120GB hard drive when I have quite a few programs, I had to reduce everything to around 256KBPS, which is still a high quality.