From what I know, when an amp goes into clipping is when the drivers and fuses in the Maggies start to blow up.
For a few years, I've been using the Spectron Musician III MK2 mono-blocks with Bybee purifiers. These amps have lots of headroom, so I've never blown a fuse, even though they output 2400 watts of power into 4 ohms. A single amp in stereo model can output pea current of 65 amps.
Something to keep in mind with the new generation of high power amps is that you should choose a set of speaker cables that can transfer all that power without much loss. I'm currently experimenting with my own built, 7 gauge (aprox), good ol' copper cables (two sets, true bi-wire) and it's amazing how good they are.
In the past, a high-power amp used to cost a fortune and the cable designers developed their hi-priced cables for these amps. Nowadays, there are a few audio cable companies that are making speaker cables suitable for high-power amps at reasonable prices.
My main suggestion is to look for a high-power, high-current amp and then revise your speaker cables if you need to.