^I bought a pair together with the K245 and I very much agree with your sentiments...although it was the fourth AKG(!) I’d listened to that didn’t sound thin. The first and second was the K260 and K240, cans I still adore btw, and the third was the K245. The K245 and K371 actually sound fairly similar frequency response-wise, although I’d give the former the nod regarding overall linearity. K245 also sounds like an open can (surprise!) whilst retaining bass capabilities I normally associate with very very good closedbacks..something I am a little confused by actually, but I am certainly not complaining!
At a 145€ the K371 quite simply destroys it’s competition - it’s that good..but at 99 the K245 literally boggles the mind. It’s a truly wonderful headphone.
Well, there is clearly a hype train for the K371, so I'm considering the purchase, but I already have the K245, and I've not seen anything close to a hype train for those (I think they've been mostly dismissed here on Head-Fi and really ignored more or less elsewhere), so I'm intrigued that you say that they "sound fairly similar frequency response-wise" but you give the K245 the nod for overall linearity.
So, given that I already have the K245, what does the K371 do better, in your view -- besides of course the obvious benefits of closed back headphones like isolation, of course?