We've been considering a heat pump as well, but haven't fully decided yet. We changed out an old oil furnace about 8 years ago, and at the time gas was going up, and electricity was cheap, so we went with electric forced air. Since then it's reversed: electricity prices have doubled with two tier rating, another 30% increase over next few years, and smart meters pointing eventually to time of day billing rates. Meanwhile, gas rates have actually decreased, and LNG plans suggest cheap and plentiful gas for a long time.
Heat pumps are very cheap to operate, but initial purchase and install cost is very high. I've also heard annual maintenance can be expensive as well. HP dealers offer maintenance plans at additional cost to cover this. I've done some rough calcs, and it will take 6 years for the investment to break even.
Other factors against a heat pump is noise, and in our case, the unit would be located outside of our bedroom window. Also, you have to keep your house at a consistent temp, as the heat output at the registers is quite low, so if you like your bedroom cold at night, you can only set back a couple of degrees.
But I've talked to lots of people who love their heat pump, and on things for sure, electric is now a very expensive way to heat a house, and will be a liability when it come time to sell.
But in answer to your original question, in Victoria we've found Four Seasons very friendly and knowledgeable, not necessary the cheapest though. We had cheaper quote from EcoSmart, who also seemed decent.