As we've all said a million times, this stuff is all subjective.....however, since you seem to be soliciting feedback, here's mine.  I would personally, never sacrifice musicality just because a board was a few pounds lighter.  If you are performing for other people, the only thing that should matter should be the overall sound.  However, I'm guessing that in the average nursing home venue, the audience is not going to be too critical of the styles or sound quality of any of the modern arranger keyboards.  I own both the Tyros2 and the PA1x Pro, having bought the Korg about a month after purchasing the Tyros2.  Despite what others may tell you, if you are a keyboardist with any degree of skill, you will NOT be happy with 61 keys, especially in an arranger keyboard which is usually in split keyboard mode.  For that reason alone, if you've already decided on the Korg, I would definitely recommend getting the "Pro" model; the advantages far outweigh the slight inconvenience of having to hook up external speackers.  Styles are largely a matter of personal taste and genre' of music but for me, it's the single biggest factor for choosing one keyboard over another.  Suffice it to say that since I've had the Korg, I have not played the Tyros2 more than a half dozen times.  Sure, a few of the SA voices sound good on a demo and probably even superior to it's direct Korg counterpart, but in ensemble mode I don't think it really matters.  It's the overall sound, especially when mated to a style, that gives the Korg my vote.  I'm talking about the viceral feedback you get when you play the thing.  But again, if "spit and polish" is your thing and saving a few pounds of weight is that important to you (most of us could use the extra exercise) and 61 keys is acceptable to you, then I would say, get the T2.  It is, after all, more ergonomically designed and (quite frankly) easier to use.  Of course, ease of use is something that only has relevance in the early stages of owning a keyboard.  Just my thoughts.
Peace,
chas
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"Faith means not wanting to know what is true." [Nietzsche]