Ok, start with the MP3 player.
Personally I would go for any of the SANSA models. Great range of products from the basic clip (just music and excellent for audiobooks too) up to the Zune which is a bit flashier. Quality wise they are great, they support playlists (iTunes ones too), they have a record function, built in radio and a couple of equalizer settings as standard. Very reasonably priced too. It is generally felt that they're among the best MP3s available.
One issue to consider is what you want the MP3 player for. Be aware that most are now multi media so they have video (ipod Nano now takes video), games, etc. Personally I only use mine for listening to music so I don't want or need any of that stuff.
Really for the 4GB capacity, then try the SANSA Clip if all you want is to play music. You might as well go for the 8GB seeing as in Xtravision it's around €70.
Another bonus of the SANSAs (over iPods anyway) is they're drag and drop, so as long as the ID3 tag info (song title, artist, album) is ok you don't need itunes or anything else.
However: if you're getting a docking station this is where there may be some issue. Most tend to be set up for iPods and will only support other devices through a standard audio input. So it will still play, but it won't sit on the docking station and it won't charge the thing.
That's a bit of a sickener.
The iPods are great (I also have a classic), but can be expensive and if you only want music, then all the bells and whistle are a waste of money.
Anyway, a decent enough docking station is the "pig" currently on sale in Harvey Norman. We've one and the sound is very good, plenty of different fittings (though all for different iPod sizes) and most importantly the connection is robust. Some are a bit weak and become loose meaning you can't play the iPod withough using various devices to prop it up at the right angle.
So, in conclusion: for a very good day-to-day MP3 player, SANSA really are up there. However, there is the issue with the more common docking stations only being set up for iPod products.