Fran,

We have been here before quite a few times.
I will have my first JS Musical Resources for the PA1000 ready in about 10 days. I am not saying it will do miracles but it will certainly enhance the sonic quality etc. of the Korg PA1000.
The more I play and program the more I like it. Its potential is huge. Apart from that it comes down imho whether you are a singer or not, and whether you are a performer or home player.
Of these two boards and as a singer ( performing or not) I would definitely go for the PA1000, not knocking the PSR mind you.

regards
John