Always wanted one of these in, same with a Vosper Type I or II...heres the specs.
Type II
Length 73 ft (22 m) 
Engine 4,200 hp 
Speed 40 knots (74 km/h) 
Range 480 nmi (890 km) at 20 knots (37 km/h) 
Displacement 49 t 
Armament 
Two 18-inch (457 mm) Torpedo 
QF 6 pdr Mark IIA (57 mm)
20mm Oerlikon 
Two 0.303 Vickers MG 
Crew 13 
Lacks the torps but makes up with a deck mounted gun, aircraft would eat you though.
And since Im a canuck I have to add this in aswell.
RCN MTB
Manufacturer: British Power Boats, Hythe 
Displacement: 55 tons 
Overall length: 72 ft 6 inches 
Breadth: 20 ft 7 inches 
Draught: 5 ft 8 inches 
Maximum speed: 38 to 41 knots (new) 
Armament: 
auto-loading 6 pounder gun (57 mm, 2.24 inch) 
Two 21-inch (530 mm) torpedo tubes 
.303 or .50 Vickers machine guns 
20 mm Oerlikon or 40 mm Bofors cannon 
Powerplant - three Rolls-Royce or Packard 14M supercharged V-12 (three shafts) 
Power - 3,750 hp total 
Range - 140 miles (260 km) at 25 knots (46 km/h) 
And for looks I agree S-100s are purdy.