I feel your pain. I'm an American living on a Pacific island. The nearest hifi showroom is 3000 miles away. So for decades, I've had to buy every speaker system, audio component, even cables, without the benefit of auditioning them first.
I really hate that, but I've learned to live with it. The last few years, I've prefaced any major purchase with lots of researchm including enough questions on Audiogon & similar forums to make myself a real PITA! (Actually, I hope not, but I bet I have.)
And even so, about 1/4 or my purchases were disappointing.
D