Harbeth Super HL5 Plus speakers & integrated amp pairing recommendations


I'm seeking suggestions for an integrated amp to match with a pair of Harbeth Super HL5 Plus speakers that I recently acquired. I listen to mostly smooth jazz via streaming or CDs, no vinyl.  My listening room measures 22' x 22' with 11' ceilings.  I welcome your recommendations for integrated amps.  Thank you. 
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I’m driving my SHL5+ 40th with a VAC 160i. I run a REL T7i crossed at 45 just loud enough to not know it’s on but more of a feel thing for the lowest octaves. I’m tempted to try a Luxman 509x but the VAC is just sublime. 
@rcalderon I am currently running mine with 2 MC275s.  I initially started with only 1 but felt like it was running out of gas on certain types of music.  I still feel that way now with 2 of them.  Do you feel that 1 is enough?  I still feel that my Pass XA-30.8 was by far the best.  I am very tempted to get another, but I don't want to lose a ton of money on the MC275s.
I'm using Naim pre/power on my Super HL5 Plus.

Don't skimp on the source/DAC as I find it equally important.
I’ve been using an Adcom 5802 (from the 1990s) to drive my SHL5+ Anniversaries. No shortage of power. It sounds terrific.

I think I saw one on ebay for $95!
(yup: https://www.ebay.com/p/Adcom-GFA-5802-2-Channel-Power-Amplifier/66787188 )

Because of the Adcom's heat, and fear of aging parts (I’ve had it worked over once), I’ve been thinking about trying a new Benchmark AHB2. I gather quite a view Harbeth users favor that combo.