SO I've got a 10" Alpine Type R sub (the 1021D) currently sat in my room waiting to go into my car, problem is I have no amp or box as yet.

SO recommendations for an amp please.....

I've got an Alpine 9835i Head unit, I was looking at an Alpine MRD M301 as it has a direct amp link to my head unit allowing me full control from the head unit, but at

Its a shame you didnt get the 1041D, could of ran it a 2 ohms then, but not to worry.

I've just got myself this amp to power my 1241D:

http://www.alpine-europe.com/content/english/a1513.det.MRD-M605_DIGITAL-MONO-POWER-AMPLIFIER.htm

400W @ 4 ohms 14.4V should be fine for your sub