I've had the LM2 for a few years now. I picked up a 6.0 when they first hit the market, and I foolishly sold it soon thereafter. At the time it seemed redundant to have both. I recently picked up another 6.0 in trade (from a cool TB'er). In acquiring another 6.0, I'm delighted at how it brings something different to the table than the LM2. I am generally in agreement with the consensus opinions of these two amps. To me, the 6.0 is more crispy/hi-fi, defined, and "interesting" sounding than the LM2. The LM2 sounds fantastic, and it's strength seems to be in a full-bodied, transparent tone. I prefer the 6.0 EQ options, but I find the LM2 more "plug and play". Different products, different flavors. Love them both. And there are plenty more flavors to choose from. But I'm wondering...what's next? We've seen an incredible proliferation of bass amp improvements in the last 20 years. And now these two same companies have 800-900W products with essentially the same form factor. And while I think Markbass has introduced very logical improvements to their existing stable, I haven't heard anything that would warrant an investment in an upgrade (jury still out on the 9.0). I mean this in a very positive sense; the LM2 is just a great amp that's hard to improve upon. So, spoiled as I am, I'm musing about...what's next? Smaller/lighter is moot. Sure we could bump up the wattage, but it's already a diminishing return for most of us. The customer service of most of these companies kicks butt. The prices are way, way cheaper than amps of the past. Where is the next quantum leap? Or have we reached a saturation point of goodness? (not a bad place to be!).