The O11D, standard size or the O11 Air (may look less premium because of the front) are good value considering the quality of the case.
At 100ish, even less as B-Stock, I would easily recommend.
Even for air cooling, the bottom fans will help the GPU, a lot.
Too bad the regular O11D doesn't provide any fan, but considering how bad most provided fans are, I'm more than happy to buy a decent solid case and a box of five Arctic P12 PWM for 20 odd quid and be done with.
One thing most O11D owners can confirm is the quality.
The metal on the fan slots is firm. Just check Gamer Nexus review of the O11 XL vs Phanteks Enthoo Pro 2 and that's exactly what I mean.
I owned Thermaltake in the past (ages ago, Armour, pure nasty plastic), Phanteks (Enthoo Primo, P400S) panels aren't flush and thin metal, Fractal Design (Define XL R2) monster of a case, quiet and quality. Not as modern as most would want, but a case for many upgrades.
If going a bit less generous, I would suggest the Lancool II mesh, but 3 decent fans included and amazing airflow.