At the risk of being blunt - how much helicopter can you afford?
Turbines bring simplicity, reliability, outstanding performance, but horrendous running costs. Figure out how many hours per year you are likely to fly (be realistic) and for how many years. From that total see how many TBO's you are going to run into on each aircraft, get a S.W.A.G. on the cost and see if there is any measurable difference to help you make a decision.
If you are reading this while lighting cuban cigars with $100 bills, then just go out and buy an MD 530
