Jono, I’m now universally using Happy Otter Scripts’s Kwik Preview. Like Shift+B, Build RAM Preview, it is also volatile but is both Faster and doesn’t take RAM away from the RAM reserve. It is STUNNING! I’m using MagicRGBA (yes, that’s MAGIC and not MAGIX!) as the encoder which is in itself blisteringly fast. Anybody making complex graphic and texture rich environments, would do well to explore it.
Wayne is a member on this site, hopefully he’ll jump in.
Getting your narrative/story succinct is what Editing is all about. Seeing it work on screen in the fastest way is always a boon.