Great Escapade versus Air New Zealand RTW

Hi all, as some of you know Steve & I are planning a Great Escapade next year & I've been busy researching everything for months - many thanks to Sarah for all her tips via PM a a few months back. I was on the verge of taking the plunge & booking direct with VA, and also reaping tons of miles in the process by getting 6 miles/£ on AMEX.....however
....I've now seen that Air New Zealand is offering London to NZ RTW Business Class with Virgin & NZ for £2,800 incl tax. The Great Escapade is £3,996 excl tax, so way over £4K.
Given that our planned itinerary is LHR-HKG-AKL-SFO-LHR it seems to be a no brainer to go with NZ's offer & save way over £2K - especially if we can opt to fly VS on the LHR-HKG & SFO-LHR sectors and thus earn max TP's
What do the rest of you reckon?
Cheers,
James
....I've now seen that Air New Zealand is offering London to NZ RTW Business Class with Virgin & NZ for £2,800 incl tax. The Great Escapade is £3,996 excl tax, so way over £4K.
Given that our planned itinerary is LHR-HKG-AKL-SFO-LHR it seems to be a no brainer to go with NZ's offer & save way over £2K - especially if we can opt to fly VS on the LHR-HKG & SFO-LHR sectors and thus earn max TP's

What do the rest of you reckon?
Cheers,
James