Captain Sim 757

Hello there.I'd like to purchase the Captain Sim 757 and I'm ready to do so, but unsure of which route to take. I live over in the UK, so can purchase it disc, if I may post a link, see here http://www.amazon.co.uk/757-Captain-Add-FS...5877&sr=8-1On the disc, it claims to have all 200, 300 and freighter variants.Looking on the purchase to download at the Captain Sim website, there are Pro Pack, expansion and F block. To me it appears that the Pro Pack is just the 200 variant and I'd need to spend more on expansions to get the 300 and freighter. Is there any difference at all between this disc and the download, apart from the variants? Is the ACE and Weather radar on the disc?As for block F, I've no idea what it is, I've even looked on the CS site and I can't say I'm any clearer.Thanks,Ant