I think $3500 is a bit much for a 20lb amp even if it had 10k wpc.
Since when is worth of an amplifier correlated to its mass?
I'd rather have an amplifier that is lighter, quieter, and more energy efficient for the same power.
Looks like an Outlaw M2200 w/ more power to me.
It's actually nothing like Outlaw's knockoff of the old NHT A1 monobloc: Class D rather than G, SMPS rather than torroid-based PS, considerably deeper chassis, and roughly 10x more powerful.
Here's a gut shot:
Though for most uses I'd guess the only functional difference between them is that the Anthem would be more energy-efficient at typically-demanded power levels. Unless one's rack isn't deep enough to fit the Anthem, in which case it will be an eyesore compared to the Outlaw.
Perhaps a better way to think of the Anthem amp is as a slightly less powerful but much much better-looking and quieter (because it has no fan) half-height
Peavey IPR-3000*. (the IPR-3000 could be 1RU; the only component inside it that wouldn't fit in a 1RU case is 80mm fan. The stock fan is quite loud, but it's just a 12V computer fan, and can be replaced with a quieter one quite easily. One just needs the new fan and either snip some wires or buy an adapter to fit the IPR board's 2-wire plug.)
In comparison, the Anthem has some other nice features, too, such as a 12V trigger and 2-prong power socket to help avoid ground loops.
Of course, one also has to consider that the Peavey amp is under $400. $3100 buys a lot of control gizmos and electricians' time to fix grounding problems…
Now, would I ever buy one of these Anthem amps? No. However, I'd happily pay $3500 for an IPR-3000 with some heat-sinking (to eliminate the fan), a 12V trigger, a glass front panel with two aquamarine-backlit wattmeters... I'd also strongly consider $3500 for an 1RU convection-cooled Class D Anthem (or other brand with similar after-sales support and warranty) amp that was ~150Wx7/8Ω and 250+Wx7/4Ω. The closest thing to that currently available, Harman's similarly-priced Crown Comtech CTS8150 and Lexicon DD-8 twins, is cheaper than that, but has the same power at 8Ω and 4Ω.
*The IPR-3000 can easily be bridged, but it's kind of kludgey. One needs to use two Speakons to do so. The better-looking and slightly more expensive (and, as of yet, vaporware) Crest Prolite versions of the Peavey IPR should do away with that kludge