Hi Pat,tubes are like tires,you'll never get two people to agree on them and /or get the same results from them.You have lots of options,Groove Tubes,J.J.'s,NOS,military,EH,Svetlana and several more.I prefer the NOS or the military ones,(JAN) but look and shop around,you'll never know where good tubes will show up,flea markets,yard sales etc.Check the forum on this site regarding tube choice and you'll find lots of info.,pro/con,good/bad,etc.Hope this is of some help,good luck,Mel.