This is really a personal thing.. I've tried/used them ALL.. and love / hate certain things about each one. There is no "photoshop" organizer out there - no "buy it - you'll love it and it is perfect" app yet. Here are a few to get you started - however, I recommend you just download each one a give the demo a try for a week.. if you find one that you understand and like the UI/functions for, that's the one!

Iview - decent interface now that they fixed up the PC version (was MAC only) but missing some advanced features (ie: scripting, versioning) that may not matter to non-photographers.

ACDSee - again, wonderful interface with lots of power and you can even get an entire list of scrapping keywords/categories for it.. but, the software is a bit bloated and eats CPU - not for the low end machine.

IDimager - complete and wonderful product... the only thing wrong with it is the user interface and complexity.. This is the product that I use and manage my professional photography business with.. but it is not for the non-technical... v4.0 is coming out this year with a revamped UI.. I continue to hope!

Thumbsplus - a true catalog program with very good speed and keyword search ability.. it is missing some basic stuff that should be there in a product by now - ie: downloader, file renaming, versioning.. but it is an easy UI, and very very fast. I use this for my personal photos.

Imatch - totally professional and tremendous power.. but again, a UI that only the pros will love.

Picassa - nice UI but limited functionality.. it is free with is a bonus!

ExifPro - not a true catalog program per se.. but the nicest small photo / file viewer out there.. Reallly a hidden gem - I use it to quickly see keywords and it has a great rating/slideshow and lighttable function.

So many more... Photo Mechanic, BreezeBrowser, Adobe Bridge, Photoshop Elements, ... the list goes on and on. To be honest, I do like what I've seen from ACDSee's numerous products.. the latest is version 9.0. You might give it a go first since many users here like it. Just be sure you have a decent PC first.

Good Luck.. Phew!