5AR4 seems much more sane now. If you're using psud2, then checking for current saturation in the choke should be easy. High current is why dual core chokes are often used, like LL1673. I personally think a dual core choke would be more appropriate for the current you're talking about.
Concerning the first capacitor, be wary of heavy AC charge current if you're using something larger than 33uF or so. If you push this, both the lifetime of the tube and the cap can suffer. The circuit I was experimenting had problems with hum when the input capacitor go too large. I found that using a series limiting resistor to control peak in-rush current helped. This is usually calculated from the coil resistance of the transformer and then adding a small resistance inline to reach some target value for the rectifier used. Check the datasheet to determine this. Also, the sound was heavily influence by the grounding arrangement. Most important seemed to be the diode connections. Remember, anything connected to them will radiate magnetic field, so keep the wires short and close to the chassis. This really helped the sound, IMHO.
This is about the extent of my experience on the matter I'm definitely not an expert, just a tinkerer.