I decided to try and do a recap of my office M33s based on the improvement I got with the DSP5000s. Below is a breakdown of the parts to service a single M33 (don't forget to double quantities for a pair). Before buying the components I would suggest opening the backs and checking the component values.
Board Qty Ea Value Manufacturer Part No
Amp 2 1000uF 16V Nichicon UFG1C102MHM
5 10uF 50V Nichicon UFG1H100MDM
2 100uF 35V Nichicon UFG1V101MPM
4 470uF 16V Nichicon UFG1C471MPM
2 4700uF 35V Nichicon UKW1V472MHD
2 3.3uF 400V Ansar Supersound
The two 1000uF 16V capacitors are a larger physical size than the originals, but they do fit with a bit of a squeeze. You will also need some thermal grease to put between the heatsink and the chassis upon reassembly.
This may also be applicable to DSP33s