Hi Stevo,
I'll start off by saying that I also know very little about leccy boats, but the prop selection will depend largely on the motor used - along with the Amp Hour and "C" ratings of the LiPo. The more powerful LiPos usually have a P (parallel) element in the rating as well as the S (series) rating. Cells in series gives Volts, cells or strings of cells in parallel give more current (Amps).
If it is a brushless motor, the main factors will be the KV (RPM/Volt) rating, and the power rating of the motor. The KV rating will tell you the maximum RPM the motor can turn for a given voltage - although the actual RPM is governed by the speed controller. For a given power, the higher the KV rating, the smaller the prop you will be able to turn (but at a higher RPM). The wattage of the motor will largely govern what size of prop you can turn at a given RPM. The bigger the prop you want to turn at a given RPM, the more power (Watts) you need. Usually, the power train (motor, battery and ESC) would be chosen to suit the hull, and how you want it to run.
For efficient running - in terms of prop slip etc, there will also be a minimum prop size (primarily in terms of diameter), which will drive the hull efficiently. For a deep vee of that size, as a rule of thumb, I would say that you really want to be able to drive a prop of at least 55mm diameter. Somewhere around 47mm is probably about the absolute minimum, but probably won't really push the boat very happily, bite very fast or accellerate very well.
With dog / surface drive props at least, the minimum pitch to diameter ratio is normally 1.4:1 (eg Octura X4 series).
I don't want to be negative, but if you want to go fast - or anything like fast, with a deep vee of that size, you need A LOT of power. Similar sized hulls on the MHZ website are suggested to be paired with the BIG Plettenberg motors - running on 30 odd Volts, and driving 60 odd mm props. Here's one example:
http://www.mhzusa.com/Ocean-Spray-m-1757.htmOf course, if your deep vee is more scale orientated than fast, or if you already have a motor, ESC etc which suit the hull, a lot of the above is irrelevant.
Not sure whether this is any help whatsover or not........
Ian