Tweaking my Cronus Magnum Tubes


I'm wanting to tube roll on my Cronus Magnum. I have the KT 120's and the standard small tubes that came with the Magnum.Also have the KT 90's. Should I update the KT 120's to Gold Lion 66,77 or 88's There's a quad of Gold Lion 66's on sale here at Audiogon.

W#hat are good small tubes to update and what small tube position are most important to update?

Thanks mates!
gooddomino
Leave the 120s installed. If you use phono, try some Telefunken ECC83 etc. there.
For the preamp, RCA Blackplates (NOS) provide a very open smooth soundstage; not too expensive.
I'm guessing these are the 12AU7 tubes and the phono stage is the pair of 12AX7 (ECC83).

Telefunken are more detailed, Mullard NOS have a classic tube sound, but very expensive. For a new tube, EH Gold Pins (Electro-Harmonix) are very popular.
http://www.musicdirect.com/p-6997-electroharmonix-12au7-tube-gold-pins-ea.aspx

Some good info on tube types at Brent Jessee