Kui The Panda

I've looked into planar magnetic headphones and they all seem fantastic. It seems like he-500 isn't on sale? And how do the He4xxs compare to other planar magnetics? I'm kinda lookin for a wider soundstage after listening to my M50x's. Elex soundstage is great, maybe could be a little larger but maybe that's just me. I think the more "fun" sounding headphones definitely seem to be the more bassy ones and planar magnetics especially. Any DAC/AMP recommendations to go with said headphones?

Yo folks, slightly new to the audiophile hobby but I have done SO MUCH researching on different headphones to get a good upgrade from my M50x's. I find that the soundstage is a little too small and the sound is kind of boring to jam to music to. Currently, I'm not using an AMP/DAC (never used one before) and i'm just using my computer audio jack and I know I should at least invest in either of those for a more comfortable experience. I also do own the Focal Elex but yet again I have no DAC/AMP to pair it with. I've listened to the Elex by itself on my computer audiojack and obviously the soundstage and bass is good, however, I can't help but notice I get some sort of fatigue listening to them (Could be an EQ thing, I haven't messed with EQ for either headphone, if there are any EQ recommendations for elex i'll take em). So my point is: I'd like another headphone to upgrade from the M50x with a DAC/AMP combo, that's not too neutral/boring but not overly muddy like the M50x. The price range for both the headphones and the AMP/DAC would preferably be around 600$ total, and i'd like to pair the amp/dac not only with the recommended headphones but also my Focal Elex. If there are headphones that are considered more "fun" to listen to (Looking at the sony MDR z7 and Fostex TR-X00, possibly even the 6xx) than that would be appreciated. Just lookin for recommendations to a noob.