Subwoofer help Req.

About a week ago i could happily wire a headunit and your standard 6x9 and door card speakers as you do, but now i wanted a sub and i wanted to know everything about them from wiring to peak performances and so on.

I want a system which is above beginner and one where when cranked up i hit my comfortable sound threashold before it does.

At first i was looking at this JVC sub 700 watts RMS, 2000 watts PEAK.

http://www.jvcmobile.co.uk/product.php?pr=220

and i was going to use this amp to power it as everywhere ive looked says try and better the RMS wattage of your sub with your amp by up to 125%, and that peak isnt a neccesity.

http://www.jvcmobile.co.uk/product.php?pr=174

Now as the sub is dual coil and so on i could get it to run at an Impedance of 2ohms if i ran the 2 coils in parallel

Now id like somone with a bit of knowledge to tell me if this system would be a few steps up from begginner and if it would be worth purchasing, also taking into account i listen to Drum and Bass + Dubstep mainly.

Or would it be wise to go down the route of 2 less powerful subwoofers instead of one?

Any help and advice is appreciated.

Hollings.