Hi! Thanks for your reply. I have been waiting for one for a long time now...
I have some questions:
1. Is there anything there that could be changed to fit this proportion: better performance with lower/same price
over outlook? You see, my case has no window and I am not interesting in one, so I really don' care about how parts look.
i choose price first, looks second actually

thats the cheapest possible for everything. only exception is the res which is truly your choice.
2. Can you give me a link to 1/2" fittings and tell me how many I need to fit my whole watercooling system? I will greatly appreciate it.
if you follow everything i have laid out, if i didnt mention it then the part already comes with 1/2" fittings. just check at the bottom of the screen, right next to "Add to cart" to make sure you get the right fittings
3. Can you tell me what is an advantage of having that radiator for $130 over $52 one? If it is only for the outlooks, then I'll go with $52 one...
the $130 does a much better job of quickly getting rid of heat. although, it really depends on noise. if you get a slightly more powerful (therefore louder) fan and use the swifttech radiator, you really wont notice the difference. and i chose the 2x120mm rad so it fits at the top of your case
4. With the tubing - do people usually cut them? I am talking about making it shorter if I don't need the full lenght. Is it hard to make? Do I need to buy anything else to do it? Like fittings or something like that? You see, I have no knowledge of watercooling and this will be a first time I am messing with one.
yup. when i say get 7 feel of whatever you want, you get 7 straight feet of tubing, which you will have to cut down to customize it per the distance between blocks/rad/res/pump. and to cut it, high quality scissors are the best. one thing that looks like it would work would be a cigar cutter, but i have never tried that =/
5. What is a difference between internal and bay reservoirs?
there isnt. one looks a little better if you have some really cool colored coolant (distilled water) but they both serve the same purpose.
6. I decided to go with GeForce GTX 280. Can you suggest me a water block that I can connect with that video card to fit my whole watercooling system?
http://ekwaterblocks.com/shop/product_info.php?cPath=21_31_42&products_id=279&osCsid=d78cdf348783c576ec1f35c1a48418b8 is the only decent one but i cannot find it in any store. its a good company and i wouldnt hesitate to order that from them
7. One last final question is: If I get all those parts and set up a watercooling system. Will I have
anything on the outside of my pc case? I really want everything inside you see...
nope as long as you get a 2x120mm radiator it should fit in the top 2 fan holes in your case, hanging down into the internals of the case
Thanks for all your help...