Hello I own the Studio 20 v.3's and just love them. When I did some rather extensive listening to the Studio Line I was not too impressed with the Studio 40's. Sure, it will give you a larger soundstage but at the expense of imaging. That is, the Studio 20 v.3's do EVERYTHING the Studio 40 's do BUT with better imaging and more articulation in the upper midbass and migrange regions. However, the Studio 40's will offer you some lower frequency extension but it is not as tight as the
Studio 20's. I also believe the mids sound a bit better balanced than the
40's, therefore, at the time of purchase, I did not see ANY reason whatsoever to spend the extra $300-$400 dollars. Use your money more wisely and go with the 20's. The imaging and sound they produce is absolutely stunning!!!! Hope this helps. Happy hunting.