AFAIK it's fairly easy to replace the HDD in a PS3 so you don't need to stick to the 60GB one just because you wanted PS2 BC.
I have no idea why games aimed at children like Tearaway (which is 30€ retail here, 25€ on the PSN store) are so easy, kids don't need coddling like that. As kids we couldn't afford a new game every week, we had to make do with them for months at a time so an easy game that you finish quickly is a terrible proposition. These days the mentality is that if you didn't beat a game you didn't really play it but back then getting part ways in, dying and being forced to start again was normal. You don't beat a game like Ghosts and Goblins or R-Type, you just keep trying. Hell, as kids we didn't even beat Super Mario Land or Sonic 1 (Master System) but that just meant there was more for us to experience there. Ad the games that did have saves to let us beat them had HUGE piles of content, games like Super Mario World or Donkey Kong. It's all 4 hour "tightly crafted" campaigns these days, not large world maps with literally a hundred levels. Yeah, they reused assets a lot, the same blocks appear in most Mario levels but there were still a hundred hand crafted levels in there that (most importantly) played differently.