The Kona PHD is a flat bar racer, although depending on the top tube length, and the length of your torso and arms, and even if you buy a frame larger or smaller than your body size, it might be a upright or crouched position. I think that for a first bike is a bit posh. With Kona you'll pay more for a lesser specced bike, because of the name.
PhilthyPhil, the advantage of flat bar is that you always have your fingers near to the brake levers. For a noob they're probably easier to use. On drop bars you don't have brake levers on the flats or drops (unless you ride on the hoods) Cyclo-Cross has the best of both worlds.
Depending on the type of riding/commuting then I would look at these models, or types of bikes.
Commuter- Kona Smoke. Tough frame and wheels, guards and fittings for panniers. Steel frame and forks. Heavy and slow.
Hybrid- Cross between MTB and road bike. Slightly lighter frame, higher gearing, 700 tyres around 35mm.
Flat bar or proper road bike. 700x18-23mm tyres. Very light and nimble, but usually no fittings for guards or panniers. Some do have guards, check Ribble (go in the shop to buy one, don't buy online)
Cyclo-Cross, road bike with tougher frames, drop bars with flat brake levers, tougher wheelsets.
Tourer- great for higher milage, usually based on road bike but with steel frame and forks, relaxed riding position, fittings for guards and panniers.
There is a huge choice, more confusing as back when I started you could only get rigid MTB and road bike. Plus BMX's but those don't count
Since you're riding on canal paths, which can be quite bumpy, then I would probably look at road bike with 28-35mm tyres. Fit muguards otherwise you'll get filthy, and perhaps panniers if you need to carry loads.
My two bikes