Lovely wee setup you have there… I bought those speakers for my partner as a first foray into “proper” hifi and she absolutely loves them. If you feel brave, the Q Acoustics subwoofers are good value and a great add-on! Fully agree with the comments about filled stands - and there are matching Q Acoustics ones that screw into those speakers for a good foundation, if you feel like they must match… Also, move them apart if you can. Start with an equilateral triangle with you at one point and the speakers at the other two. Then experiment. These don’t need toeing-in. When you feel like upgrading (after the stands and the subwoofer) perhaps start with the dac. A RME adi-2 is a great next step. Principally, I hope you enjoy it

No. Buy a pair you want and will like. The price is secondary

I use mine for travel (and love them) and the open backs stay at home :)

I got mine earlier this year and I have loved using them since. I hope you get as much pleasure from these amazing headphones as I do!