the band said the IEM sound especially was noticeably improved.
See, I get the IEM thing - it's a
very controlled auditory response... but that is good!
At first I thought it was just that a compressor helped. But I've used other compressors. Not $460 compressors, so maybe three really is something to be said about quality. Not that the MXR M87 isn't a good compressor, but it isn't a $460 tube compressor running at 12 volts and all that.
That is a chunk of change though... I could not justify that sort of money on a single unit.
Maybe a really good preamp/DI (tube or no tube) really does make a difference. And if it makes a difference to us and the band, maybe that's enough.
I do think that a quality preamp is a better investment than a quality DI. If your sound is great to begin with, even a cheap DI will reproduce enough of that great tone.... but if your bass is coming up short, I'm pretty certain that a quality DI will only exemplify that deficiency in the tone....
If the church is prepared to buy both quality units, then great. I have played in some big places, and it's 99/100 times a Radial box and whatever I bring to the party