I like to try out any given type in a simple amp to see what the presentation is.
I tend to like foil/oil ...
Its best to have a few different types around to audition in what ever your noodling with.
I was fiddling with a high gain toned pre where a ceramic cap gave the best tone
for whatever reason, and I don't prefer them, but that type in that circuit was just so.
Its your amp, use your ears and try not to make assumptions.
The less caps in the circuit the more the type will color.
The first cap of the circuit can be critical, the value, the type, and the
impedance of the stage shapes whatever comes after.
don't sweat it, try out different types when you get the chance.
You can even put a little RC filter in front of the home stereo amp and listen to program.
Boy, I hate to mention this, but I just trashed a couple of boxes of NOS green Sangamo and old Mica caps. Been sitting on them for years, but found they were too unreliable for the repair work I do. I put them up on ebay a few months ago in the old cigar boxes I had them in, but nobody bid anything for them, so I just put them in the trash. If I run across any more of these, I'll post it here to see if anyone wants them.
I'm starting on a build in the next few days, and am going to experiment with a few caps. The amp is basically a Top Hat Club Royale with a few changes (a little higher filtering in the power amp, 4 EL84 instead of 2), and I've got some Solen Fast Caps on the way. Being that I typically use Mallory 150's, anyone got any comparison between the two?