If you are looking at simulators for helicopters then there is only one direction to go at the moment.....Phoenix.

It is far cheaper than Realflight and far, far better judging by all the converts that have dumped Realflight.

Apart from being an excellent sim that runs much easier on less than optimum computers, Phoenix is also renown for their excellent customer service and commitment to give free upgrades to all purchasers.

After Phoenix, Reflex would be the next best, Realflight would be a distant third closely followed by Aerofly Pro Deluxe (but aerofly is excellent for fixed wing)