like gkrasley, ive tried a few different types of pick ups & for the most part i prefer the sound hole pickups also.
i have a UST--passive--on my Guild, no preamp, & sometimes i have to use it, but usually i mount a Dean Markley woody-type single coil. nice crisp, clean sound & no quack. surprisingly hum hasent been a problem in the 6 months or so that ive ive been using it.
my luthiers shop has a couple or the K&K transducers that he thinks the world of, & ive seen it on other forums talked up quite a bit. interesting, but i would need to hear it thru a spruce/mahagoney dreadnought (similar to mine) bwefore i start saving for one 
1 2013-12-28 19:15:56
Re: Under Saddle Pickups vs Soundhole Pickups (8 replies, posted in Guitars and accessories)
2 2013-12-28 18:46:44
Re: Acoustic Amps (16 replies, posted in Guitars and accessories)
Hi All: new guy here just sticking my nose into your conversation i have had no dealings with that Ibanez amp--i run a Crate CA30 that ive had for years, & if i used the UST on my Guild, i would usually set the 'low' at about 3/4, set the 'mid' all the way up, & the 'hi' between 1/4 to 1/2. the 'contour' i would have to fiddle with & a touch of reverb would bring out a little more depth.
also for awhile because of hand problems, i had to go from 12.5 to .11's . when my strength began returning i went back to .12's & in either case never found it necessary to touch the truss rod. the slightly heavier strings did also help the tone a bit also. so there you have it. my experience