A couple of comments. . .when I first got back into vinyl I used a pretty cheap ($75) Grado that didn't look like much but was enticing enough to keep me interested. I currently have the Clearaudio Virtuoso Wood which is a more expensive relative of the Beta and I'm completely pleased. The Beta was very well reviewed and I think is still considered to be a winner at it's own price level, as well as at even higher ranges.
Regarding the phono stage, your son may need one regardless. While MC cartridges generally are lower in output than MM cartridges, even MMs are not putting out line level voltages like that of CD and Tape.
Generally speaking, phono stages are far less common as 'built in' features than they were back in the day before CD. His pre-amp or receiver MAY have a phono input and if so, it's likely to have enough gain for an MM cart, but possibly not enough for an MC cart. In the event his rig does accommodate phono input, it might be useful to find out how much gain it has--this is usually expressed in dB. Hope this helps!
Regarding the phono stage, your son may need one regardless. While MC cartridges generally are lower in output than MM cartridges, even MMs are not putting out line level voltages like that of CD and Tape.
Generally speaking, phono stages are far less common as 'built in' features than they were back in the day before CD. His pre-amp or receiver MAY have a phono input and if so, it's likely to have enough gain for an MM cart, but possibly not enough for an MC cart. In the event his rig does accommodate phono input, it might be useful to find out how much gain it has--this is usually expressed in dB. Hope this helps!