Are cylinder pressure and boost pressure inextricably linked

[Poodle]

Ginge, if you want to boost low-end torque (heh heh), you want a quick-spooling turbo with minimum lag. VNT is ideal, but expensive and complex to do right. Low-tech version is the twin-scroll... No where near as good as vnt, but a decent improvement over standard.

Really it all depends what your end-goal is, am I right in thinking you want a combination of easy power and good economy? If so, a quicker spool will keep revs down as you won't need to rev for the power, it'll also keep the power easily accessible without having to shift down all the time. The main downside is back-pressure at motorway speeds, but on the island you won't really see those. I'd keep the top mount for now, more efficient turbo will make up for no fmic if you're not revving it.