The model they have in the Mobile World ad is probably the AW1051X. Its not top of the range for Audiobahn, but at the price its an excellent sub. Amp-wise, the Alpine V-series is a good amp: excellent circuitry, efficient cooling and nice design, however I think to go with a competition spec sub like the Audiobahn (and some people might disagree with me on this, I guess youre either an Alpine fanatic or not) I would go for an American amp, such as a Lanzar Vibe or a Pheonix Gold. Another to consider (and one of the best kept secrets in car audio land) is the new chrome Legacy LA Competition range (not the black American Classics, theyre sh*t!) These are really sh*t-hot amps, hugely powerful, and brilliantly designed with loadsa features. An LA890, or even a 690 should give more than enough kick for your requirements, and for way less cash than an equivalent Alpine model!
If you look at the true SPL boys, theyre using the above brands plus Audiobahn, Rockford, Atomic, MacAudio, Kicker... not really Alpine. Deffo more boom for yer buck, and bear in mind that power ratings for good US amps are always quoted very conservatively, in RMS, and so anything pumping 100W per channel is likely to be louder than a 300W/channel peak Euro/Jap amp.
