I'm a big fan of the EN.480B, which is IMO the best value entry level turbine. (A used 480 is even better value, but the later 'B' has useful improvements).
Advantages:
- You'll get a late, low hour example for relatively modest money.
- It's a new(ish) model based on an established proven design
- It was designed as a Turbine trainer for the US military and is used as such by various military around the world
- It has an excellent safety and reliability record and tough build integrity
- It has a sophisticated 3-blade fully articulated rotor head
- It has conventional cyclic controls
- It has a flexible spacious cabin set up with various configurations - although best as a 3 seat or 2+2
- It is very comfortable, especially in windy or turbulent conditions
- The handling is safe and benign
Disadvantages:
- Although the cabin can be configured as a 5-seater, it's a bit of a compromise and not for 5 adults (bear in mind that any of these helis with 5 adults will have restricted range)
- Although running costs are reasonable, it needs three new TT straps every two years (c.£6,000)
- Not as fast as a 500 or, probably, R66
Turbine 480B « Enstrom Helicopter Corporation