I believe that woodcutting bandsaw blades will work well over a range of around 2700 SFPM up to approximately 3400 SFPM, but it is best to stay in the middle of the range. The acceptable range depends on the type and size of blade, blade thickness, and also the bandsaw wheel diameter. Generally, speaking a speed of 3000 SFPM is satisfactory for all woodcutting blades.
Regarding power delivered to the load, it is the same as the motor's rated output power minus any transmission loss. A single stage v-belt is fairly efficient and as already mentioned, you need to pay attention to minimum and maximum belt wrap angles for best efficiency and longest belt life. Slipping is not an issue as long as the belt is not worn out and is properly tensioned. A belt might slip if it is seriously under tensioned. It will also slip when it has worn to the point that it is running on the bottom of the pulley rather than running on the sidewalls.
At this power level, transmission loss is not normally a big deal, but if you want the greatest efficiency, poly-v (a.k.a. micro-v) belts and sheaves can give efficiencies in the range of 95 to 98%.
As far as using a 2 inch diameter pulley, that is a bit small, but it depends somewhat on the spacing between the two pulleys since that affects the wrap angle. Something else not mentioned is the maximum rim speed (usually given in FPM) and maximum pulley angular speed in RPM. The first number is related to how fast the belt wraps and unwraps while the second number relates to the maximum rated safe load due to the moment of inertia of the spinning mass of the pulley.