Thanks for your opinions, guys. I know that the development of Dreamcast has been stopped, therefore I was afraid because of the possible quality of the game. But considering the price one must be REALLY dumb choosing PS2 games (where I live the console costs about 700 - 800 $, and more than 200 $ for each game - an approximate estimation bearing in mind the difference of life standard). So in this particular case the obsolete, cheap Dreamcast seams to be a solution.
And I know about the PS2 emulation. I really doubt if it will ever be finished, and even if it will, it will not match my minimum computer requirements (even though they are superior to the ones required for playing modern PC games and using all the present emulators).