I would say a factor in the decision should be if you intend to charter it out at all, which is where the 206 beats the R44.
As with all aircraft, the purchase price is only part of the story, the running costs and maintenance factors should play a major consideration.
If you toast the turbine in a 206 you could buy a 44 for the price of the replacement turbine (not that you would do this, but one of the risks to consider if you don't have buckets of cash to splash out).
If you can afford it, go for the 206, though I would say if your budget only allows for 44, don't stop from getting it because it is not a turbine.
If it is well maintained it can be as safe and rewarding as a 206.
I would say buy the aircraft that allows you to afford the most time using it, based on mission practicality and cost. No point having a pretty machine just sitting on the ground....