First off, I would recommend going to lossless format. Then you will not be re-ripping the collect again later. But if you must use 256K the only reason to use CBR is that some older and now rare devices can't handle VBR and some kinds of network streaming need CBR. But for general use VBR is better and lossless is a perfect copy.
Cool. Thanks for the info guys. I'll think about Lossless.
And yeah, these would be rips from teh original sources. Trying to redigitize my CD collection....I got a lot of U2, Bruce and Wu-Tang Clan to go through (what a trifecta)