I bought Konami's Ys VI PS2 port for $39.99 when it was released just to support it BITD. Yeah, I surely don't think it was worth that much now, and it is inferior to the PC version, but the main thing at the time was supporting the Ys series (although you may know my predicament when it comes to X.X.XSEED "Games," and not exactly being a cheerleader anymore).
That does strike me as interesting if you feel this Taito port is superb over that version of Ys VI. I'm more inclined to take a look at it some day then. I didn't know that a working PS2 emulator had finally taken off, this PSX2 you mention. That's good to hear.