For another viewpoint on Half-Minute Hero: I have it and enjoy it. The only mode I've finished, though, is the "Princess 30" shoot'em-up mode. Other than that, I'm partway through the "Hero 30" RPG mode, stalled because I got stuck trying to earn some of those difficult hidden titles. I think it's quite fun, though, and the humor is off-the-wall nuts (not to be confused with "off-the-walnuts").
However, if you should decide on HMH and intend on getting the download version, check around the Internet to find out if it's been fixed. I recall reading that the download version had some bugs in it when it came out, that did things like screw up some graphics and sounds.
As for games releasing tomorrow in the PS Store, will the arrival of No Heroes Allowed! (the third game in the What Did I Do to Deserve This, My Lord? series, previously known as the Holy Invasion of Privacy, Badman! series, this time published by Sony itself and with yet another name) sway you? Or perhaps Ys: The Oath in Felghana? I'd get Felghana, if I were finished with Ys Seven already.