i'm still at work
...so I checked out the items.
for the heck of it, checked it all at amazon to make it easy for you
The Z-2300's have a ton of reviews, and all quiet positive. I'm sure you can't go wrong with them. And to be clear, you're wanting to compare the logitechs against the ones in the Philips package? When I was in electronic sales, I never pushed any philips product on people (bad salesman I know). Philips is a big brand with crap quality, hehe
But for this I'd have to say we have to look at the tech specs, ad the logs I'm sure are high spec'd for audio.