If you're looking for real power down the road do NOT give up your Teksid block. All the '99+ aluminum blocks are known to be weaker then the Teksid ('96-'98) blocks.
Get it rebuilt. I probably wouldn't go with DSS based on problems others have had. They're not local, but Modular Powerhouse in Atlanta did an excellent job on my engine. Shipping a short block is really not that much of an issue.