I've been using stomp for months with both of my acoustics (Martin CEO-7 & Gibson J-45 both with LR Baggs Element). I ran a pretty extensive analog rig before to get the best tone possible but found that the stomp can get me pretty close. I'm simply using the studio preamp, some verb and spent a lot of time with the EQ. For church use I spent a lot of time with our sound engineer to EQ each guitar perfectly for the church which makes it very consistent. I've been really happy with it. I've tried IR's for acoustic but they do nothing for me (although I use IR's all the time for electric).
That's my 2 cents. Best of luck!