PCSX2 runs PS2 games AMAZINGLY so i wouldn't bother buying a new ps2 OR ps3 (the emulation SUCKS on ps3, like actual bugs and save corruption happens)
ps4/ps5 emulation is "okay" but lacking a LOT of options PCSX2 would give you
not mention, fast forward, slow motion, save and load state, full custom controller mapping to whatever you want
and mods, texture packs, and even cheats if needed
i mean, playing games at like 6x default resolution is enough said for me, usually x2 or x3 is enough to say "nah i don't need a real PS2"
and really fast loading times (and then factor in fast forward)
i just absolutely love fast forward, so many games waste time, or you just wanna get it done quicker (see ANY JRPG game)
and save states, i don't care, i use em, some games get infinitely LESS frustrating with save states.
on like a gtx1050 and 8gb ram and intel i5 (8th gen) it's more than enough to go into like, 4x fast forwards WITH 6x resolution, barely any effort