Power needed for DVC subs in parallel

I have 2 Alpine SWR-1022D subs that will be wired up with voice coilsin series, then in parallel with each other givin a total of 2ohm. What I want to know is how much power to feed them. I figure that being in parallel and 500wrms each, they will need a 1000wrms amp (Eg. Alpine MRD-M1005). However the 2 Alpine dealers I have spoken to have both said to use the 600wrms MRD-M605 amp. I always assumed that it was better to go bigger than smaller as distortion from underpowering was the main killer of speakers. So which way do I go? Also I as these are my first DVC subs, are they rated per coil or as some sort of total? Eg. 500wrms per coil, or combined? Help and opinions would be greatly appreciated.

According to the Alpine website the suggested RMS or continuous power handling of these woofers is 300 watts total. So 150 per voice coil.

Power Handling Capacity (RMS) : 300W...from the Alpine site.

So taking the suggestion of the local dealers is advisable. An amplifier producing a total of 600 watts RMS at 2 ohms is an ideal match for you. There is no need to go higher than this. You simply encounter more strain on your car's electrical system and exceed the thermal power handling capability of the subs.

Last years model is 300WRMS, this years is 500WRMS. Look here for SWR-1022D: http://www.alpine.com.au

My mistake, I was looking at the s-type

Well, if you feel the need to power them to the full RMS rating (which I am a fan of) get an amp that is capable of producing 1000wrms @ 2 ohms.

Wrong assumption and a lingering misconception.  Overpowering kills speakers.  And idiots who turn up the gains past there limits kill speakers.  But this much is true:  you should buy enough power to make you happy, and the speakers should have enough capacity to handle the highest amount of power you throw at them.  Which means that the speakers should be rated greater than the power source.

In your opinion stevdart, which amp should I go for, the 600wrms or the 1000wrms? I know that powering speakers at their max will kill them, but I was also told that using an amp that is too small would have too work at it max, therefore creating harmful distortion. Thus it was better to choose an amp capable of powering the speakers to their max so that during normal use, the amps would not be working hard. That means if I was to use the 1000wrms amp it would most likly never be pushed over 3/4 of its potential power. On the other hand if I was to use the 600wrms amp, even at full power it would only deliver 300wrms to each speaker, and would therefore be constantly running at its max. This is what I think, if I'm wrong correct me and tell me what I should be doing.