First of all PiotrekDGT,
If you want to buy from soccer.com, their shipping internationally costs about 40 EU. I would recommend you try eBay as most Laser's listed on there are readily available at most sizes and end up going to about $100 USD (64 EU) a pop. If you tell me your US shoe size, I'll try to look for some for you. Shipping on eBay internationally ranges usually from $20-$40 and their shoes are cheaper than at the store, but you have to make sure your buying from a legit seller (which I can check for you if you find a listing ... I have almost 500 feedback hehe ... decent experience).
F50's may also be a good choice but they have been known in past models (.7 .6) to not be very durable. I think Adidas have improved this problem this time around with the .8's by changing the chassis and sock liner stuff. I have a friend who has had F50's, and the key to making sure they last a long time is making sure the studs are correctly inserted and to make sure they are tight but not extremely tight, or else this might cause the chassis to strip.
And boots are not made specifically for any position. Sure Nike may market Vapor IV's on attacking players like Ronaldo and Drogba, and have defenders wearing Laser II's in their commercial's, but it honestly doesn't matter as long as they are comfortable and the right size.
If you buy any K-Leather shoe, you don't need to worry too much. Just make sure to buy 'leather food' and apply it every time you see the leather is starting to harden. In fact just read 2Brown's nice guide about it and you will be all set: