I think in the long term I might bite the bullet and get a K&K mini fitted. I’d have a go at fitting it myself as the sensors that attach to the bridgeplate seem easily done but the thought of drilling out the strap button hole to take the jack plug.... that’s a different matter!
I’ve been mulling this over and am now leaning towards a soundhole pickup with a built in preamp. I wouldn’t need to spend money on a tech to fit it and of course my guitar would still be ‘original’. The K&K mini is around £100, the recommended preamp is another £100, then there is the cost of having it fitted on top of all that.
Some of the more expensive active, ie. they have a built in volume control, soundhole pickups are cheaper than that total.
From my research into all this I’ve read many reviews recommending a separate external preamp because they allow greater flexibility in terms of sound modelling capability (even for guitars with factory fitted active pickups) but this is not really a factor in my ‘play in the house’ status. It is my playing ability that limits this and of course I’d be using the acoustic setting on my electric amp not a specialist acoustic amp.
However I can’t find a review that says whether or not the output from an
active soundhole pickup is enough to work a looper!