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I don't have any experience with that exact amp. But there are more powerful ones for a bit more money. What speakers you're trying to power is normally what drives amp selection. That being said, what is your speaker setup?
Well the good news is the amp you chose will drive your speaker selection beautifully. It's not enough amp for the sub though. That's a 500W RMS sub, and your amp will only push 300W RMS to it. Does that mean you "shouldn't" run that amp? Not at all. You wont hurt a thing. That's the good news. The bad news is you'll never drive the sub to it's normal power level. For some people 300W on a 12 is plenty. This could be enough for you. Only you will know that answer.
If you're willing to spend a bit more, I would look into this AMP. It's perfect for the components you listed and it's a remarkable amp. I'm not sure what your budget is. Also, are you wanting Infinity for a particular reason? They're not a bad choice, but there are alternatives out there that can outperform them.
That's a solid performing amp, if the numbers are good. Personally, I don't have any experience with it, so I can't give you first hand knowledge as I have on the other items I listed. But all in all, I would definitely run 2 ohm items to max out the power available on that amp...especially the sub. It takes a HUGE hit in power running at 4 ohms.
I really like the NVX amp and woofer. It has tons of great reviews. Anyone have comments or suggestions? The box I have has a mounting depth of 7.25 and .86 internal sealed box.
Really hard to make the choice for you man. If you picked one or the other, you could then pick the ideal alternate part to compliment the chosen selection. When you lay out a bunch of parts, they will all perform tasks similarly. What am I saying? Pick a sub that you like, then match the amp that you need to tie it all in...OR...pick an amp first, then pick the sub that will work best with the amp you chose. Half of the work is done...you have component speakers. Take their RMS power requirement into consideration while selecting a 5-channel. Once you find the amp that best drives your components, take a look at the sub channel and it's specs. Then find the best sub to fit that sub channel. Make sense?