Thanks all for the suggestions and the welcome to the forum! I wonder if it could be just me thinking that it’s too loud. I have a bamboo whistle from Eric the Flutemaker which is great, but not tuneable. Maybe I should just try a Susato and a Dixon. Plus, I wasn’t wanting to get anything much more expensive than a Susato Kildare.
Nice stump house. The stumps around these parts aren’t even big enough for hobbits let alone humans. All we got is stone, lots of stone.
A syn whistle is not loud, really, just crisp. A Susato S-series would be a bit louder. You should give a Burke narrow bore a try though. They are loud enough to carry in most environments but the volume is not top heavy as it can be in some whistles. The volume is nicely balanced across its range. They are more expensive than a Susato Kildare but worth every penny, IMHO.
Another reason that I suggest the Susato and the Burke is that the tuning of those whistles seems to play well with keyboards and other instruments I run into at churches. But YMMV.
Feadoggie
This area was first logged off about 100 years ago. Yours should be long gone.
Got stone here too 
Effects of church… Biblical, see…
But I don’t think Denny ever logs off.
I go away for a while…but not long.
Any whistle whatsoever, which plays well, works well with church gigs.
I’ve used all these on church gigs on a regular basis
(whistles in every key, chromatic, from Low D up to high Eb)
Burke and Susato are my go to whistles for church.
Just played a church gig Sunday.
It was uilleann pipes for a few things, MK Low D for one thing, old Generation C for ST PATRICKS BREASTPLATE and BUNESSAN, Freeman Tweaked Generation B flat for SLANE.
SLANE (Be Thou My Vision) is usually in E flat and works perfectly on a B flat whistle. I never had a B flat I liked until I got that Freeman one.