Reading devices depend on the needs of the learner and the type of reading needed

What sort of measurements do you want to make, and how much money can you afford to spend?

For a single-mode absorbance plate reader, I recommend the Spectramax Plus 384 (Molecular Devices). It is easy to use, robust, and has excellent photometric stability, in that the variation in the absorbance measured over time is +/- 0.0001 OD unit. This characteristic comes in very handy when making kinetic measurements with small absorbance changes. It is monochromator-based, so any UV or visible wavelength can be measured. (For far-UV measurements, you need to use UV-transparent plates, not polystyrene ones.). There is a cuvette holder, too, in case you want to use it like a regular spectrophotometer, which is very useful if you don't also have a spectrophotometer.

Here is more information.

https://www.moleculardevices.com/sites/default/files/en/assets/data-sheets/br/spectramax-plus-384-microplate-reader.pdf

For fluorescence measurements, I like the Pherastar line (BMG LabTech). It is also easy to use, robust, and has excellent photometric linearity. My favorite feature is that it has two detectors, allowing you to make kinetic fluorescence polarization and dual emission wavelength measurements, which is not possible on most instruments. It is rather expensive, and since it uses filter blocks, you have to buy a different block for every application. This plate reader is multimode, so it can also make absorbance and luminescence measurements. With add-ons, it can do TR-FRET and AlphaScreen, too, but the cost gets quite high.

https://www.bmglabtech.com/pherastar-fsx/

Spectramax Plus 384 is a good choice. I recommend also the Tecan readers as they are robust and of outstanding optical quality. It depends on the purpose of the reader and whether you want to measure fluorescence only or also anisotropy and luminescence,