I've always loved Aprilia's.. but that V4 is rumoured to be priced at $38,000. Did you see the clips of Max Biaggi testing it. They are on www.superbikeplanet.com
Also I've had the chance to own a few Aprilia's.. but be aware dealer service is a nightmare. I've had a friend who's bike was knocked over.. and had to wait 6 months on a swingarm from Italy.
A great deal now tho.. is '04-05 Mille 1000 Factory. Full ohlins supsension, Brembo brakes, OZ wheels.. thats $7,000 in factory installed mods.. added to the excellent performing regular Mille. You can find that bike used for about $10k or less.
Not trying to poke into your wallet.. but I think the pricetag of the new V4 is goin to scare alot of people away. Hell I know I'd love to own a V4. Shyt I'd love to just ride a V4 engined bike.
The V4 engine is the best of both worlds in the motorcycle world. You get the torque of a Vtwin.. but the insane uptop power hit of inline4.