It's def CPU not HD maxing out so yeah I figured it wuld be marginal gains. I know which pluggins to avoid stacking up in order to prevent the stuttering but it is starting to become a limiting factor.
Anyone here got a suitable replacement for sells before I hit ebay etc?
Would be happy with iMac or MBP or even Air. Not worried about storage as I keep everything on external HDs anyway. Just need a fast enough processor and enough RAM to run multiple instances of software plugins in Logic Pro. Thunderbolt would be a huge plus too as it means I could use an external soundcard to run UA pluggins.