I'm looking at building a 20x40 pool with an 8' deep end and possibly a spillover spa. I think that means I will need a 2 HP pump. Our electricity is fairly cheap at a total of 8.2 cents per kWh (Nominally it's 5 cents/kWh but with the "fuel surcharge" and what not it works out to 8.2). Should I even be considering a variable speed pump? I like the idea of a quiet pump that's inexpensive to operate but I don't like the idea of an electro-mechanical device that's totally dependent on electronics with somewhat questionable reliability to run.
Would it even be worth the upgrade to a 2 speed at those electricity prices? 2 speed pumps are much simpler right? Would I still get me the majority of the efficiency benefits of a VS but with a simpler piece of machinery that, all other things held equal, is likely to last longer?