I was looking pretty hard at a EML 5u4G.  I def. think it can be considered and would/will be fine.  Technically (from the data sheet) 5U4GB have a max of 40uf as well and that is what the amps are built around.   In a 5U4GB datasheet it also mentions that a higher cap. is allowed provided that the initial current draw at startup or hot-switching is further regulated by plate-supply resistance,..   min. values are given for 40uf operation.   In that most all (I believe) of Steve amps seem to work well with a variety of rect. tubes including ones that specify a much lower cap.,  I think that the plate supply resistance (trans legs) are already sufficiently high enough to limit the current draw for a larger cap.  Just how much idk,...  Perhaps Steve can/could weigh in on the suitability of suitability / risk of failure/arching when using rect. with a low cap. maximum.  and or with the PT resistance on the sec. legs.

Hey John,

I missed your post, sorry about that.
I picked up an Aqua and an EML. ( and a globe 80 )
The EML is a freaking huge rectifier!
It has been quite awhile since I had to run an amp in.
I ran the 25th for the first 30 hours or so with the Aqua.
Then I switched it out for the EML. ( the older I get the less patience I have )
I know that I should just let everything settle in before tube rolling, but from the good report on the Aqua, I thought why not just start with it.
Immediately after firing up the EML though, the illusion of space increased dramatically.
I don't know if the Aqua needs more conditioning or if the EMLs are conditioned extensively at the plant, but the difference was immediately noticeable without running in the EML.
Do not expect to view the mesh plate glow head on, the key way is at 90 degrees so you view the EML mesh plate skinny side, unless your 25th is placed that you view it from the side.
I also started right off with a seasoned HP Amperex 7308 Red Tip PQ in the input socket.
I am a bit over 50 hours of run in and it is sounding very very nice.

Robert