Thanks! I'd not heard of rEFIt but thanks to the power of search I'm now fully aware! Ultimately what I would like to do is get hold of one of the latest standard MBP configurations, but with the hi-res anti-glare screen to replace my old trusty G4. I'd planned on using it mainly docked to a USB 3.0 hard drive but was considering installing OS X on the USB 3.0 HD if it had been fast enough. I suppose thunderbolt would be fast enough to boot from but it's a little pricey right now. I'll probably just get a Crucial M4 128GB SSD, and just copy across any files (mainly photographs/videos/tracks) that I need at the time, with everything else simply stored on the USB 3.0 HD
I could also opt for a 1TB internal drive too of course...
How would you guys proceed? I have gigabit ethernet and wireless n too so could store things on my freeNAS box. Basically I have a massive amount of photos/music and ripped DVDs etc. Hope this makes sense!
Ahhhhrgh so many options!