They really are a masterpiece of gaming. I suggest you buy a pre-owned slimline PS2 and copies of the games... or a PS3 if you can afford it and appreciate them in HD with better frame rates, as they really did have bad frame rates originally... especially SotC. The fact you will be able to play The Last Guardian and continue the series will be a bonus. Plus there are many other great titles for PS3... Uncharted series for e.g.
I'm no fan of brand fanboyism, but I seriously can't figure anyone who doesn't want to own a PS3 in this day and age. It is home to some of the finest games in existence.