I'm also a fan of the Kral line. I have a Jumbo (tuned by Troy) a Puncher and a Knight. The Knight is basically the Puncher pro in Bullpup form. Bought my Knight from PA as a refurb. They have them now for $569.
Try getting in touch with Troy at Annihilator Airguns. I had him build me a .25 Jumbo out of a .177 and he modI died the one that came with the rifle to .25