Turbo V6 is the best option, but as we know, expensive to get the full potential.
Both the other options are simpler and cheaper..
(The benefit of fitting the low compression Laguna V6 engine is it can still reap over 200bhp in normally aspirated form, and if the urge allows, you can add the turbo with no other internal mods required.
Obviously the exhaust valves are not sodium cooled but it will cope with a mild boost setup up to 300bhp, maybe even more - its cheap to experiment)
