To be honest, i got a PS3 jailbreak, and PS2 games looks a bit awful and some don't work like the translated version of J-league or some i got.
PCSX2 1.60 with good settings works way better and it's the same about slowdown.
Only the 60gb FAT got the Emotion engine chip from PS2 on it, and an upscaler... Check vids about the FAT 60gb upscaling and you see how PS2 games were transformed. Not the case with any other jailbreaked PS3... But i repeat, it's hard to found a 60gb fat you will found very expensive price, and it's risky as the console was fragile due to the conception, and the oldest version so the most used... I tried to found a completely restored one, but impossible at a regular price.
So i recommand if you want PS3 games to buy it, also Retroarch works well on it even if i didn't tried (as i already got a Raspberry running pretty well all those games. From my side, only Top Spin, Fight Night, and some Remake like Devil May Cry HD Trilogy i got interest.
I tried WE2014 Aoki Samurai (better than PES 2014), FIFA 10 WC, FIFA 11 and also PES 2014 : the issue is that i tried everything, during a week : there's no way to get DLCs i tried everything, so you can't apply any Option files. I'm thinking to resell it on Rakuten, i can make without those game after retried them.
I orderer a 45 euro PS2, for PS2 games which i got more interest, 3-4 things :
-FreeMcBoot Memcard : it's replacing the old chip > you can put every games on an USB key from every regions
@goalgerd i recommand that stuff to you if you didn't already got one, as the issue with PS2 is the cd lens... I killed 3 PS2 because of it. The PS2 was solid except that and still running trough, that was pretty annoying...
-One adapter for any type of pad, even wireless
-An HDMI converter
-And a 64 Gigas USB key : i've readed that 128 gb wasn't that reliable.
+ for graphisms on an LCD i already got a Scanlines simulator which gives a pretty good rendering (i posted it on Naruto PS2) cost is 29 euros but it worth the price, as i play on my Raspberry : the combo scanlines and anti-aliasing filter gives a superb rendering on old games.
At least every games, even modded, will run on it, and without slowdown like on PS3 or PCSX2 on some versions of WE or PES. To me those slowdown and lag are the most annoying stuff for a PES. But some, on PCSX2, runs very smoothly, like PES 2008.