very hard to answer. and no way you can be objective here... you need to listen and decide for yourself.

that being said, yamaha has many styles appropriate for the genre you're doing. it even has several styles called "worship" just as you mentioned. anyway, you might find yamaha styles a little too cd-like for p&w music.

korg's styles sounds crisper and clearer because korg sounds are generally more open, hights are more pronouced. while this is good for solo instruments, i find the styles a little bit too brigh. just very little.

roland has good general sounds and styles. i like them best. but that's just me. for playing live, or even recording, roland's advantage is six fills compared to 2-3 in korg. also, the styles are more "band-like" than yamaha, the drums sets really make a difference. and dont forget cover and make-up tools.

but the bottom line is you have to decide, do not expect anything else from here but personal oppinions and biased advice.