Which tubes for Wavac MD805m


I would appreciate any feedback from Wavac MD805m owners regarding their experiences on different input tubes. I am new to trying out alternative tubes. As far as I understand, 12AU7, 12AX7 and 5751 tubes can be used on the unit. Thanks.
ycekin
I dont know, but my dealer suggested NOT to change the tubes on the 805 cause I would ruin the sound!
I replaced the stock with United 805s. Sounded much better. Tighter and more transparent!
This is an old thread but....
The best 805 is the Amprex 805, unless you can find couple of WE331A?

The 12AX7WA, say Mazda FSE are lovely.
I am as yet to try tube rolling for the 6Y6g..tubes