I have not heard the OB Tektons, but, I’ve heard their Double Impacts and Moab speakers and I think they sound good for their respective prices.
OB speakers can sound a touch thin in the upper bass and they typically do not go very deep (the front and back waves from the drivers are in phase at lower frequencies and cancel each other). But, if you are not a bass freak, I think they can sound good.
As to crossover parts, most speakers don’t have really expensive capacitors in them, but that does not necessarily make them sound bad. There are even expensive parts that certain speaker designers don’t like. I know a custom builder that thoroughly hates Mundorf caps—he can hear a speaker or amp and know it has Mundorfs in them.
I too like some field coil drivers. That is why I would love to hear either the Pure Audio Project OB Quintet or Trio models with the optional Voxativ field coil midrange/tweeter module. I’ve heard their non-field coil models and I have heard the Voxativ field coil driver in another system, and I am guessing that this would be a magical comination.