I've ridden a Blackbird before. It felt like riding a great white shark, as in it was a big grey monster. When opening it up, it just kept going, awesomely fast and linear power. I didn't find it comfy, though that's relative as at the time I was used to a much more upright bike. Would probably get used to it, but quite tucked in position and a bit of a wide bike. Brakes were very good. Don't think there's much out there with more power for the money? Twin exhausts look meaty. Personally around a litre I'd be looking for something like a 2004 Kawasaki Z1000 (4 exhausts), or Triumph Speed Triple. That said the Honda Firestorms look nice... or a Fireblade is a classic. Or A Daytona 955i, or a Zx-9r...