Studio Reference Amplifier

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I'm planning to build the regulator. I'm wondering about transistor substitutions. Can I use MJE5032/33 for the BD241/242 and MJL21193/93 for the large ones?

Also, how critical is the 2k2 for the trimmer? Can I use 2k?

Thanks, Terry
 

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I built Sr200 Couple of years ago, and have been happily enjoying it till recently.
Now I am looking forward to rebuild this amp with latest version.

Would it be possible to integrate a preamp inside along with the amp. A tube stage or may be any good dac chip. This way it will be a complete amp .