Build what you like. Play the game to have fun. Play the mission to win.
To be fair, that is a savings of 125 pounds, which is pretty darn significant. GW could learn a thing or two from FW about bundle deals!...The renegade kits are beautiful, if I wasn't already neck deep in Thousand Sons and Mechanicum, I'd be sorely tempted by that deal!
In my 20+ years of gaming, I've never once been able to drop $820+ for gaming toys all at once. I do wonder how often these kinds bundles bear fruit.
I think these kits are targeted towards "year end xmas bonuses" that some people get. But still...wow I'd be so intimidated by all those models!