Thanks all for your replies, yes I should have clarified that I'm not planning to use any subwoofer. The Pass Labs XA25 is intriguing me apart from raving reviews and reliability of gears, because seems to have a huge reserve of power, it's a 25W at 8ohm, but damping factor is 500. Huge current, plus at least 100W A/B class that can be delivered at 4ohm (after the first A class 50W), if necessary. For sure the DI's are not as easy as many horn speakers, but I was wondering whether the XA25 is really enough for them. Did any Tekton owner of this thread tried this match? No subs of course. Also wanted to ask for other tube integrated recommendatons apart from LTA and Line Magnetic product. The Raven is a very good one, maybe somebody has also a feedback on it? Thanks!