The 2x25V transformers are probably inadequate to keep your supply rails in regulation if you plan to run +/-30V rails.
The 2x55V transformer will put out too much voltage (55 * 1.4142 = 77V, and that's under full load. Even higher unloaded), enough to damage the C5/C6 capacitors on the σ22 even if you change to 63V caps. Not to mention that it would make the σ22 drop some 40V to give you 30V output, and 3 β22 boards drawing a total of 600mA means that the poor power supply will have to dissipate 0.6A * 40V = 24W (12W per MOSFET). Too much heat.
You can use the 2x30Vˊ 63VA transformer, it just won't give you as much current headroom as the default 80VA one does. But it will work.
The 225VA one is needlessly large for a headphone amp. You could use it, but you'll need more chassis space for it, and the larger a transformer, the stronger the stray magnetic field it emits, which is something you'll have to deal with if you plan to put it anywhere near the amp boards (read: hum and noise).