I'm not sure if there's an easy answer to this question, but is there a clear ranking of all the Meridian DSP Speakers when compared to each other? I know that for the current models it's:

1. DSP8000
2. DSP7200
3. DSP5200
4. DSP3100

But what about the older models (e.g. DSP7000, DSP5500, DSP5000) ... where do they slot in?

Now that I've had a 861v4 for a few months and now have a HD621 on order, I'm tempted to upgrade my speakers. To maximise my investment, I would buy secondhand and am therefore keen to understand how they all compare.

Trinnov Altitude 32-8-16, Meridian 271, Front: DSP7200SE, Centre: DSP7200SEHC, Rear: DSP3200, Ceiling Front & Rear: DSP320.2, Sub: Velodyne DD15+, MC200, Oppo 203, Sony VPL-VW360es, Lumagen 5348.