Browning and Beretta have long set the standard ...for reliable, strongly built O/U's ...and in the case of Browning, in their Citori line of guns ...they have about 26 models - ranging in price from $ 1,500 - $4,000 or so ....
Can you get as good a gun from companies like CZ, etc ....maybe, maybe not...
Its not just fancy wood....its about the steel, the durability of the barrel to receiver connection, are the barrels "regulated" so they have the same point of impact ( on a lot of the lesser expensive guns, no - they don't / and
I've seen some of them off by more than a foot at 21 yds...and that's a lot), the triggers...how do they break and reset...or are they gritty and stiff...
resale value is an issue ...with Browning and Beretta commanding ...and maintaining their values ...well after they've had 200,000 shells thru them, if they're taken care of.
Kolar is certainly a well made gun ...if you want a good American made gun...but entry level pricing is around $ 10,000 or so ....
CZ, Ruger, Mossberg, etc ...a lot of them are made overseas....Turkey, etc ... but they might work for you ..../ hard to tell. But what I do know - is a Browing or a Beretta --- regardless of which model you pick ...will still be there doing everything you ask it to do ...after 250,000 - 500,000 shells..or more....with few, if any, problems.
In terms of Browning ...not all the Citori line of guns ...will work out for everyone. They have a number of models ...with different weight, stock dimensions, etc.
Personally, in a 28ga ...O/U ...I shoot a Citori XS Skeet model with 30" barrels that I've been very happy with. The 28ga and .410 in that model are special order guns ...built on the 20ga receiver...but its a gun that will last in my family for many generations ...at around $ 3K if you can find one. Other Citori models ....like the Lightning series, the 625 series, etc come in 28ga as well...some in 28" or 30" barrels ...depends on what you want.