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"Class G can be as efficient as class D or T. While a class G design is more complex, it is based on a class AB amplifier and can have the same clean characteristics as well."

so class G and H would be more efficent then class D?

Oh well, I'm more than confused now, so, what should I get from the list up there? maybe other options?

Class G: Class G improves efficiency in another way: an ordinary class AB amplifier is driven by a multi-rail power supply. A 500 watt amplifier might have three positive rails and three negative rails. The rail voltages might be 70 volts, 50 volts, and 25 volts. As the output of the amplifier moves close to 25 volts, the supply is switched the 50 volt rail. As the output moves close to the 50 volt rail, the supply is switched to the 70 volt rail. These designs are sometimes called "Rail Switchers". This design improves efficiency by reducing the "wasted" voltage on the output transistors. This voltage is the difference between the positive (red) supply and the audio output (blue). Class G can be as efficient as class D or T. While a class G design is more complex, it is based on a class AB amplifier and can have the same clean characteristics as well.

Class H: Class H is similar to class G, except the rail voltage is modulated by the input signal. The power supply rail is always just a bit higher than the output signal, keeping the voltage across the transistors small and the output transistors cool. The modulating power supply rail voltage is created by similar circuitry that you would find in a class D amplifier. In terms of complexity, this type of amplifier could be thought of as a class D amplifier driving a class AB amplifier and is therefore fairly complex.

the Diamond is a nice amplifier.

I did a research for the Diamond Audio D3600.1 it is an H-Class amplifier, very similar circuitry to a Class-D but much cleaner.
So I guess not as efficient as a Class D amp but gives a crisper, clearer sound, and since I'll be using it for Lower frequencies I don't care much about that.
What do you think?

cant say ive used DA amps but i have a kicker kx 1200.1 and I would highly reccomend it (the 600.1)

Ok, but what about the Diamond Audio amp? Is it any good? yes I know is in the Highly Recommended list but anyone of you have hear one or tried one?

a JBL or simular 600w amp should be enough... i was at circuit city today and used their "thump room" thing and had 2 12" CVRs on a 400w audiobahn amp, it sounded kinda crappy (i think the box and amp were caused this) but it was pretty loud.

I think i'd take alpine type-r's over the comp/vrs though.

all of them amps are actually pretty good amps to go with, so you would probably be happy with any of them... the Comp VR likes a bit of power, and are good subs to go with, they can get pretty loud for the money.... but im sure with any of them amps it will be good to go... Phoenix Gold makes good amps, so again you would be good to go with them..... as for Zed Audio... i actually have a small old Autotek amp i am using that was supposedly made by him, and it works like a charm suprisingly... although i am not sure on his current amps, or really anything by him actually... so i cannot help you on that part.. but i am sure someone on here will be able too help you more.

I have a Kicker CompVR 12" sub with an Alpine 9813 headunit and I'm going to get a Class D 600W amp connected at 2 ohms, I've been looking at several different amps in the price range of 200 to 250 dlls, I've come across different and interesting options as well as other ones.
One of these options is the Diamond Audio D3600.1, but I'm not sure how it performs at 2 ohms, does it put out 450W rms at 2ohms? is it a Class D amp?

The other amps I like are the Alpine MRD-M605, the Kicker KX600.1, the Rockford Fosgate Punch P6001bd, the JL e1400D, the Infinity 610a and the MTX MXA6001.

Have any other suggestions?
How about the PG Xenon amps?
Has anyone heard of Zed amplifiers?
http://www.zedaudio.com/