Terrible recommendations if you ask me.
The first one is a quite expensive set of speakers intented for music listening,not music production.
All the other speakers are designed to be used for on stage live performances,again not for production.
When it comes to price,only the first link is for a pair,so all the other prices should be multiplied by 2.
Have a look at something like the rokit series from KRK,it's a budget monitorspeaker but quite good (imo) the RP5 speakers are 400 euros per pair. (some places even cheaper)
Have a look at some of these
http://feedback.nl/?id=26&a=207Best thing to do would be to save up some money (if you're short on cash like me lol) and when you have a certain amount,go visit for instance the nearest feedback store or store that sells equipment for musicians and have a listen at the different monitor speakers,preferences in speakers usually vary per person. (bring some music you know sounds really bad and bring some music that you know sounds really good)