I wouldn't wish iTunes on my worst enemy! It's a truly horrible product on the PC and absolutely un-needed unless you want to "buy" product from the iTunes store. But if you go that route be sure to uninstall Bonjour after the install completes (you don't get a choice up front). It's a totally un-necessary networking protocol that is only friendly to Apple products and generates undesired network traffic by blindly broadcasting for clients. It's been known to cause problems with networking on Windows systems. iTunes will complain after the uninstall but will still work. You should also consider uninstalling "Apple Device Support" unless you plan to sync with a iPhone/iPod/iPad. Personally, I'd also uninstall the "Apple Updater" as it constantly checks for updates and offers other Apple products you probably do not want (Safari for one). If you leave it installed disable the auto-check for updates and be *very* careful about what you allow it to install. It will default to install everything it *thinks* you need.
Once upon a time I would have highly recommended WinAmp. But it's gone through years of problems and I stopped using it not long after the company was purchased by AOL back in the early 2000s. The "Professional" version ($20 - but there *is* a free one) gets good reviews. It might be worth a look.
A product that gets high marks is "Media Monkey" (http://www.mediamonkey.com/). I've not used it but it looks very good and can also organize your collection. They, too, have a "pro" version that costs but appearances are the free one will do everything you need and then some. I'm looking at giving it a try myself (using a VM for testing).
There's also VLC Player (http://www.videolan.org - primarily video but can do audio - it's very good but doesn't have what you're looking for in audio playback), and Media Player Classic (http://sourceforge.n...ects/guliverkli - also very good but lacking in the audio display functions - it's basically a clone of the old Windows Media Player 6.4)
But... Windows Media Player *should* do all you need/want and comes pre-installed on Windows systems. While it's not a "great" program it's superior to iTunes IMHO. I'm guessing that's what you were using before and the OEM of your new system has a different media player installed as the "default" player *or* you're using the new Windows Media Center. On Windows 7 you can find the standard Windows Media Player by clicking the Start circle, selecting "All Programs" and looking for Windows Media Player abover the folders listed. If it's not there you can create your own shortcut. Windows Media Player can be found at: c:Program Files(x86)Windows Media Playerwmplayer.exe (on a 64 bit system - if yours is 32 bit drop the (x86) after Program Files).