you should really look into it. I had one full catalog (32,000 files) and could browse incredibly fast - with absolutely no lag.
This app also supports EXIF, IPTC tags for information.
In addition to keeping your images (it supports several native camera RAW formats - like canon, Kodak, etc.) it can hold your fonts, quark, illustrator, FreeHand, eps, pdf, InDesign, PageMaker, etc files (120 file formats in all).