Advice on best mid priced MM cartridge choice for Rega P3 (2016)

too bad you are bored chakster

the question was asked by someone learning, with a good basic tt, the thread isn’t to entertain you

the brands mentioned are not the only ones out there, but they are solid. long standing brands with good reputations for quality and good sound

person goes on a car board asks for a good solid reliable reasonable priced car... we say honda toyota vw now hyundai or kia - what are you gonna say? alfa romeo? renault?

@jjss49 Well said.

Also, Goldring makes some excellent mid priced cartridges, and the carts that the OP mentioned seem like great choices.

This may be a little out of your price range, but you might look into the SOUNDSMITH CARMEN MKII.  The OTHELLO is a little less expensive, but I have no experience with that cartridge. You can't go wrong with the CARMEN

I have a Nagaoka and must say they are extremely musical . It's the type of sound that grabs your atention , makes you close your eyes and transport you. 

On detail the 150 is very good 
 It doesn't sacrifice detail at the expense warmness . On musicality the Grados are excellent . From the least expensive Black they sound very good for the price . Problem with Grados is setup . They are a pain to get them tracking correctly and are very sensitive with setup. 

Ortofons tonally are right smack in the middle tonally . On the Bronze and Black if your system is already warm the Bronze will move it to much towards that warmness , so IMHO the Black would be the better alternative . 

The problem with the Black is that its a very neutral and revealing cartridge so you need very good electronics , if not on some recording your system might sound shrill and threadbare . 
I would recommend the Nagaoka . Musicality with a bit of warmness and detail , great tracking and easy setup . Its a bit expensive but IMO worth every penny . Take care and safe bro. God bless
. 

Check out the Hana line of carts. I’ve been using the eh, yes it’s moving coil, but can be used with a mm phono stage (47khom). It gets hardly anything but 5 star reviews, which tells me it must be pretty versatile.