I personnaly use :Explore when I just want to browse, and FuzzyFinder (<a href="http://www.vim.org/scripts/script.php?script_id=1984" rel="nofollow">http://www.vim.org/scripts/script.php?script_id=1984</a>) when I know what I want to open; it allow fuzzy (or not) completion on filenames, buffers, tags, and a whole lot of other things.