Thinking of getting a BAT VK 5I

Thank you for your prompt answers. I would not go as far as calling "dumping" the 3I, that's taking it to personal. If you read my thread carefully, I simply stated that I was thinking of replacing the 3I, and any suggestions would be welcome. Personally, I've always wanted a 5I, and the fact that it does offer more resolution, transparency, detail, bass extension, air, and a better soundstaging, may be the way to go. Improving isn't that what we strive for? As far as single ended connections, it does not pause a problem, because the 3I that I own, is Balanced throughout.
As far as swapping the tubes, I'll give it a try. Thank you for the infos. I welcome any suggestions, and thank you for your helpful inputs.

Yes, the VK30, does present itself as an option. Even the Special Editions, are coming up quite often on Audiogon. As far as the faceplate, I kind of like the look of the original Bat, they represent a unique look, a sort of design that sets itself apart from the rest.
Thank you.