Hens teeth spring to mind... Very little out there that is diesel and will do that type of speed let alone for a reasonable budget. I guess that is why people take to repowering boats like the fella on here who has put a diesel in a cougar 27.
Most fast off-shore boats are american and tend to be petrol V8s (Donzi, Baja, Formula, Cig, Velocity, Hustler etc). There are a few old sunseekers kicking about but strong money and wont do those type of speeds. A few Ribs too (scorpions etc) but again, strong money.
This looks like a good shout but is the exception, not the norm and a bit marmite. http://www.boatmad.com/forum/showthr...highlight=baja
The reality though is that unless you plan to use it v regularly or can find an Extreme (not many about), probably better off with a petrol. More to chose from and cheaper to maintain from what I gather. Best of luck