I had a chance to research most of the excellent recommendations including: the Denon 103 and variants, Lyra Delos which sounds very good, Various Dynovector options, Audio Technica Art9, Benz Micro Glider SL and a few others. I will add the Goldring Eroica LX to my research list. Most are very good options and have given me a short list of options to pursue in the future. Some are over my budget for this first MC but look very interesting for future investments.
I am glad to have decided to make a further investment in my Vinyl musical option, I was sitting on the fence for a while, trying to decide whether to sell my Vinyl and concentrate on my digital side or to make further investment into my analogue side of the musical equation. So here we go down the rabbit hole once more!
First the new (to me) tube Phono Preamp, now I have decided to try the HANA ML, which was recommended by a number of folks here and by other I trust as my first MC Cartridge. It is at the top of my budget (a little bit over) and I feel confident the Sansui SR 525 can get the most from it, although .... a turntable upgrade may be next!
Many thanks to all the information and advise received.