Perhaps you could tell us what you’ve already found and rejected?
If you’ve been searching, then you must surely have seen http://emacswiki.org/emacs/CsvMode ? You don’t mention it, or say why it wasn’t any good, though.
SES (Simple Emacs Spreadsheet) might be a useful approach:
C-hig (ses) RET
You can create a ses-mode buffer and yank tab-delimited data into it (that’s the import mechanism).
It’s probably more hassle than you were after, though, and I’m not sure how well it will perform with “huge” files.