I highly reccomend Jim McShane for sure. I purchase all my tubes from him.
If the integrated amp is a piece you like and want to keep and as Mingles said it may add value to your piece of gear and improve the sound I say make the investment. But I caution you that all mods or parts swapping won't make a poorly designed circuit better. Make sure the person you have doing the mod knows your product, has a schematic for the amp and understands the properties and sound properties you are looking for. I haven't dealt with Jim in this manner yet but I would ask him to see if he is interested or thinks it is worth it. He is an honest guy so trust his opinion.
I have a Dynaco ST 70 with a Sound Valves input board. But all the other Mods were Done by Tom Tutay of Transition Audio Design in Florida. I have had this ST 70 for over 10 years and will not part with it. I have invested allot of money into it as well and I could never sell it for anywhere near what I paid for it. But I'm happy with it. I listen to every speaker I have with that Stereo 70. Speakers like Living Voice Auditoriums and Avatars, Magnepan MG12, Spica TC 50's and soon TC 60's, Von Schweigert (spelling),Aurums, Athenas, Tannoys, Wharefdales, Alon I MKII, and some others. It was a worthwile investment. Find someone you trust to do the mods and as I said knows if the mods will make a difference. Beware of the parts swapper. You can do that on your own.
Talk to Jim about the tubes. I think if the circuit has been designed properly finding tubes that work for you will do the trick. The power supply is always a compromise for budget gear.
Cables can sometims make a difference too.
If the integrated amp is a piece you like and want to keep and as Mingles said it may add value to your piece of gear and improve the sound I say make the investment. But I caution you that all mods or parts swapping won't make a poorly designed circuit better. Make sure the person you have doing the mod knows your product, has a schematic for the amp and understands the properties and sound properties you are looking for. I haven't dealt with Jim in this manner yet but I would ask him to see if he is interested or thinks it is worth it. He is an honest guy so trust his opinion.
I have a Dynaco ST 70 with a Sound Valves input board. But all the other Mods were Done by Tom Tutay of Transition Audio Design in Florida. I have had this ST 70 for over 10 years and will not part with it. I have invested allot of money into it as well and I could never sell it for anywhere near what I paid for it. But I'm happy with it. I listen to every speaker I have with that Stereo 70. Speakers like Living Voice Auditoriums and Avatars, Magnepan MG12, Spica TC 50's and soon TC 60's, Von Schweigert (spelling),Aurums, Athenas, Tannoys, Wharefdales, Alon I MKII, and some others. It was a worthwile investment. Find someone you trust to do the mods and as I said knows if the mods will make a difference. Beware of the parts swapper. You can do that on your own.
Talk to Jim about the tubes. I think if the circuit has been designed properly finding tubes that work for you will do the trick. The power supply is always a compromise for budget gear.
Cables can sometims make a difference too.