I speak from personal experience only, and I can only say that I hope the IP provided AV isn't McAffee - that is pretty bloated and obnoxious, too (or at least it used to be).
I just switched to a new Dell not too long ago, and no longer have Quicktime (miss it). Used to loathe Windows Media Player (and Viewpoint just annoys me, but that's another story) but it serves it's purpose for basic utility. I also avoid Roxio (is that the same as RealPlayer? The only reason I don't can't watch C-SPAN online is because it requires RealPlayer - but I may be confusing it with Roxio). A "friend" installed a bunch of Roxio glut in my last laptop and it took over everything and bogged me down with programs I didn't want or need - that is something I really, really despise...
Just got an mp3 player (thinking I would start running again - ha!) and after doing some investigating online, the biggest complaint seemed to be the (yet again) obnoxious, monstrous software that comes with the little device - so I just let it sit on my shelf, unopened for a couple of weeks. Finally, I decided to just plug it in and see what would happen. No software installed - WMP recognizes it immediately, I just drag and drop. Easy. For image files, when the Autoplay screen comes up, I choose "open folder to view files", and drop jpegs in there. everything works.
There is nothing worse than (I think the technical term is) "bloatware". Ugh. I use (and update continually) free versions for my firewall and anti-virus protection, etc. I've yet to be infected (one false positive, but I don't count that). And I also like to use other monitoring tools (I like Process Explorer and Hijack This - but I don't know enough to actually do things with them - I just use them to see what's going on and what changes. Or streamline my startup programs). And I'm cautious about what I do/where I go on the web, use Firefox and clear out the gunk each time I load it and it may or may not matter but I don't save passwords or do any auto complete garbage... but that's just me. I know I should be doing more (and I'm still trying to figure out the nuts and bolts of Vista, something that seemed more accessible with XP. Vista seems to assume that I'm an idiot and I don't like that even if the assumption is correct. : ). I am in the habit of investigating things I don't understand or changes I didn't initiate, but I'm not tech savvy so it takes me a long time to figure out what's what. Usually things are not alarming even when they look ominous to me, they generally turn out to be anything but.
These free programs were just going to be my interim choice until I got to know this machine, but I'm reluctant to change what seems to be working at this point. (Dell Vostro ugly as a truck but just as sturdy - w/Vista HP 32bit. Jury's still out on Vista HP - actually I have few qualms other than the bloody way they screwed up the search function.)
This Dell came with something called "Media Center" which I've never used and didn't want but I couldn't get the machine without it. I'd rather have that space to do what I want with it and add the doodads and gadgets that I choose to install.
If something gets installed with more than I want without telling me - I get really grumpy. : )
I concur with others - if you have Quicktime, keep it (but I had a tough time getting it out of my start up programs and it was annoying to find it always loading). And I wouldn't get rid of WMP, especially if you use it for basic rip/burn/etc. I don't download music off the internet, so I don't know if that makes a difference for you. I don't like having multiple programs that basically do the same thing on my machine, but I that's me...
There are several good resources that I've turned to in the past - but I'm drawing a blank - unfortunately (and all my saved links are on the dead laptop (argh). A couple worth looking at - or used to be, anyway for software/hardware/security/networking questions. Or at least they can be a jumping off point:
http://www.aumha.org/http://help.lockergnome.com/ http://forums.techguy.org/ ...but you have to practice due diligence and do some cross checking on your info/research. But either way, you learn somehting in the process.... there are many others, I just can't think of them at the moment.
Good luck!