>What am I supposed to do? Spend a few hours to try each one and find the best for my 13 years old i5 with a Nvidia gt440 that's used 3 hours per month?

The performance difference will be minimal. It's an aesthetic choice, pick the one you like the look of or give a few of them a try.

It's like cars. Some people have extreme opinions on matters, some would be fine picking almost any car, and most test drive a few before picking their favorite.