Back in the mid-1980's, when I was first learning the audiophile equipment ropes, I needed an amp. So many choices, most of them crazy expensive; others seemed to push unrealistically high output power ratings for cheap money (that didn't appeal either). One of the big audio magazines gave an extremely favorable review to the new Adcom amp--handsome black thing, heavy, 200 wpc. I bought it (think list price was $500 or $600...not cheap money then).
Well, it was pretty good. Surprisingly good, in fact. 1-2 yrs later, after upgrading my preamp and main power amps to all-tube designs (used), I took a chance and had the Adcom modded by a company then earning great reviews for doing that w/various mfrs' gear (forget the name). Think the mod was ~$200.
Got the Adcom back, put it in the system, and damned if the bass (already pretty good) had become astoundingly good! That was perfect for me, because what I used this amp for after that was driving the subs built into my big Vandersteen 4 speakers.
That Adcom was my first "high end" purchase, and it worked out from day-1 to the day I sold it to a friend (and regretted it later!).