Yes, of course the Khartago would work great here, especially with it's somewhat warm personality, which will complement planar drivers perfectly !!!!!
Beveridges, are you serious ??? Do you really know what you're getting into ???????????????? Wow, you my man have bigger balls than me, for sure.....
Anyway, bottom line as to what I would do for amplification also based on the fact that you probably don't know yet what else you'll have in the future :
Khartago Extreme (power supply upgrade w/ 120,000 uF and the Toroid tranny) and SE + version (scale down of Kismet parts upgrades on board, with the TS Premium cabling upgrade)
That wil suit everything that you have right now really well.
Late,
Klaus