Ditto that comment on the Rega.
I had one running through a 3150. Very nice. (edit - in fact just saw the picture now I have signed in, I had the same model/arm).
My mate had one. He replaced it with the 301 grey grease, but used the rega arm. Did it really make a difference? Actually yes, it did, but the rega was very good. When he first built up the 301 we did a comparison utilising a Nad cd deck, a Technics 1 bit deck and the 301. The album we chose was a kraftwerk, I think, album. That was very interesting to do...The Nad and the Technics where just different. The Nad seemed more detailed in the higher ranges, the Technics in the lower. That was unexpected as expected them to be more or less the same. The 301 seemed to encompass both sides and then some. Bearing in mind we were both a little sceptical when he first built the 301 up, (he got it free), the result was simply astounding.
Actually he runs the 301 through a Linn preamp, into a home made gainclone then into a pair of home made kef driven speakers. The sound is, quite simply, lovely.