I think you are correct - as long as the gain matches you should be fine.
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I know many will have a different opinion about the sound, but passive bi-amping does not provide much, if any, output increase. Certainly it does not provide the additive output of both amps which is a common misconception. Amps of "x" power provide only so much usable voltage swing before clipping. Thus, adding another amp of similar voltage swing does not increase your clipping headroom to any significant degree because both amps in a passive bi-amp setup are reproducing the voltage swing of the full range signal.
You would be much better off to sell both amps and get one amp that is more powerful, IMO, based on what you seem to be wanting.
I'm using the Musical Fidelity A5 with my 100 v.2's. It works wonderfully. It's an integrated amp with 250 watts per channel. I used to own the MCA20 found that it didnt'quite have the oomph I was looking for, even though it was rated at 200wpc. The Musical Fidelity seems as though it has at least twice the power....I was told by my dealer that it has a higher gain than the MCA, that's why it sounds that much more louder, more powerful, images better, and doesn't sound as laid back. It will wake up your Paradigms and make them sound like they never have before. I'd sell both the MCA 20 and 30 on Ebay, and you'd be surprised how much you get for a resale value...(i got back what I paid for mine)The Musical Fidelity is a solid piece and is considered a true high end contender...YOu'll never have to upgrade again, and it looks wonderful. I paid $2800 CDN plus tax, so it would be a little less if you're from the states. Anyway, I hope this is of some use to you.