Thoughts on choosing an amplifier

After much thinking, too much actually. I have narrowed my amplifier choices down to a Parasound a21+, a Benchmark AHB2, or two Schitt Aegirs. Presently, my modest system is a Pioneer PL 71 turntable with an Ortofon 2M Red cartridge into a Schitt Mani into a NAD C 326BEE feeding Quad 12L Classic monitors. Time for an upgrade, eh? I though I would start with an amp and some more speakers. 

The plan is to remove the jumper on the NAD integrated and use the NAD as a preamp until I choose a preamp to go with the amp. For what it is worth, I am leaning towards a tube preamp - maybe a 6NS7. I also plan to buy a few modestly priced speakers, such as Magneplan LRS,  Zu Omen Dirty Weekend, Bowers & Wilkins 603, GoldenEar Triton Five, KEF LS50, or Warfedale Linton, rather than one more expensive speaker. I like the idea of swapping out speakers for fun, type of music, etc. So I am looking for an amplifier that pairs well with many different types of speakers designs.  Which one of the three amplifiers would you choose?

From reading the forums, people often ask the poster what type of music they like to listen to. My music tastes run from Americana to jazz to opera to classic rock to ambient electronic; mostly Americana and jazz tho.

Thank you in advance for your collective advice. It is very much appreciated.
BigMusic - First time poster
The wharfedales have positive reviews everywhere I read. They also go well with tube amps. I’ve owned many a wharfedale and they all sounded great. My latest pairing before going to the big time (at least to me) was the diamond 225’s combined with the marantz reference pm14s1 integrated, fantastic combination. I’m a Sugden class A and Tannoy guy now, but still retain my wharfies/marantz. A great pairing would be the lintons and the rogue sphinx v3.....combine this with a tubed outboard phono stage and a Tubed dac such as the jolida glass dac and it would sound great. The sphinx has a Tubed preamp stage combined with class D amp. The rogue goes well with lots of speakers and is a very well equipped integrated for the money. As a side note, me personally would upgrade the turntable to achieve better sound quality. That red cartridge is not all that great either and can be improved upon. But of course if u are happy, then it's a moot point. Just a sugestion and not a slight in any way....
If you really want a Pass XA25, Reno hifi has a used one for $3595.
+1 on the A21+, I have the A21. It pairs well with several different speakers.
I too seriously considered the Parasound a21+ to use with my recently acquired 0.7's Maggie's but being a frugal Canadian I came across a used Spectron MK III D class amp that has more than enough watts/current to drive my Maggie's and my DT Mythos ST's (91 db) for that matter. The tube pre amp I use is a ARC LS 15 and I really like the synergy between the two. If my used Spectron goes up in a puff of smoke, I will get the A21. So if you do decide on the LRS keep in mind they love power, the more the better. Happy hunting 

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