Hi Jack.

I have no direct experience of 5200s (other than looking at some, but that doesn't really count!) but assume that sonic differences between new & old versions would be subtle at best.

They do come with an MSR when bought new but if you find a good pair at a good price that doesn't have an MSR they can be bought 2nd hand quite easily, either on here (in the Restaurant) or eBay.

Good luck.

Cinema: Meridian 271, 3 x DSP640 (behind screen), 4 x DSP320 (in-ceiling), 4 x DSP3100 (surrounds), 2 x AC12 (interface). 2 x Perlisten D12s subs, Lyngdorf MP40 processor. DT 145" 2.35 AT screen. Sony VW870 projector & S-T lens, Lumagen Radiance Pro.
Lounge: Roon, NUC, Kef LS50 Wireless + 2 x REL Gibraltar-2 subs

Meridian owner since 1998