I have a 2.0, and at one point owned an IPR3000. Have not used the Berry iNuke or Crown XLS Drivecore, sorry.
Basically, the Pro-Lite amps are Peavey IPRs dressed like adults, so everything you've read about the IPR1600 except for complaints about the blue lasershow applies to the 2.0. (I do think the 2.0 has slightly more capacitance, but otherwise basically the same thing.)
It does quite well as a sub amp. It won't have quite the instantaneous reserves of a 300W/8Ω Class AB boat anchor, because peak and continuous power are about the same. But I find it hard to fathom someone being unhappy with a ProLite as a sub amp. As a mains amp...I haven't tried it, but I suspect the output impedance might make high-fidelity mains use a bit dicey.
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