For the past year I have been picking up issues of Fine Scale Modeler.
It is a great magazine that mostly caters to Historical Military Vehicles.
There are alot of AFV (Armor Fighting Vehicles) that are amazing.
There are many different techniques that carry over very well into the 40k side of the house.
The models for modern armor destroy GW's stuff,sorry no disrespect,the detail on the vehicles is second to none.
For the major model makers models(Tamiya,Dragon,AFV ect)there are probally half a dozen or more companies who make brass etch and resin upgrade to push the realizm up to museam quality.
GW will get there someday,their plastic kits keep getting better and better every release.
The main reason why you do not see more of these kits in scratch builds is the scale.
GW is 28mm Heroic which seems to be whatever they feel like at the time.
Fine Scale models two main sizes are 1/35 and 1/48.
The new game Dust Tactics is a Weird War Two game that was genius enough to make their game in a 1/48th scale.
The minis are about 34mm but most importantly fit perfectly well with the thousands and thousands of 1/48 WWII models.
I have just dipped my toe in the waters of Dust and plan to make use of the superb Sherman tank upgrade kits and milled metal barrels for use on the walker tanks.
And it also gives me the perfect excuse to start buying WWII models too.