My recommendation is limited as I have no 407 experience.
First the Bell contenders- They are a great but dated helicopter design. Mature, reliable and easy to fly within their limits. A bit less comfortable and agile than the 350. One large baggage compartment. Think "truck" that hovers- and hovers well.
The 350 on low skids is much easier to enter, quieter and comfortable as delivered from the factory. 3 smaller baggage compartments. From the pilots point view, much more room and comfortable to fly. A very adaptable airframe.
I think you'd find the L4 and 350B2 kitted out de luxe will have short legs, on the order of a half hour range and return with half hour reserve and 5 passenger seats filled. If this is acceptable, I'd pick the 350 over the L4 purely for pax considerations.
If unrefueled longer legs are an issue, the 407 might be worth investigating.