do you listen to cd's mostly? if so, maybe a sweet DAC would be of help. with a barn for a listening room you are going to get a lot of glare from reflected highs anyway as you know. tubes will help i think but without some absorbtive treatments i think you will still get ringing issues. jmo. btw, i have similar speakers, kestral 2, and use a modified jolida 502b 60 wpc to good results. they make a 100 wpc integrated that is in your $ range. but you have a lot of choices for $2500 and some consider jolida entry level so..... experiment with tubes tho if you feel the urge!