Cheers.
Yeah I would like the speakers, I will be using the jack of all trades nature of the x7
Honestly, I think it will depend on how sensitive the speakers are.
I've had a pair of Polk M40 bookshelf speakers for years, and I was satisfied with those when I connected them to the X7. More recently I picked up a pair of Chane bookshelf speakers, and they very obviously need more power than the X7 can handle. In a bit more of a rare use-case scenario, I have some vintage Stax earspeakers which are basically on-ear headphones you have to hook up to speaker amp taps... Okay, so maybe the X7 isn't a BHSE, but nothing else is nearly as convenient for setting up on my "office" desk, and the Stax still sound really reference-special.
I haven't heard Creative's XM7, but basically they were designed to suit the power specs of the X7. Most any other speaker with similar ohms and sensitivity would probably also perform well with the X7. Something like my Chanes which require more power will roll off the bass impact early and have a lackluster dull and hollow sound. I tried to say this in my review: the X7 is ideal in dorms, apartments, and other small environments where the X7's form factor is a big benefit, and you have the option to easily access it for use with headphones.
Regarding the headphone amp... Sure, other amps can outperform the X7, but the X7 is an upgrade over most of the entry-level priced stuff AND supports surround processing. Compared to something like a Schiit M&M stack, I hear an improvement in the DAC of the X7, maybe the Magni amp is a small upgrade but a bit bright for my tastes, could be better with the Uber versions but then you basically are spending closer to the prices I've seen on Massdrop for the X7 for vanilla devices without the features offered by the X7. If you're a gamer with a mid-fi headphone, like me, you won't
need a headphone amp like the Mixamp or Recon3D needed extra amplification connected to the headphone jack, compared to those the X7 has a great amp. Just maybe not "endgame."