What is the one train you wish you had the most?

there is 1 train/set tht i'm hunting for. after my last defeat... this set is high on my priority list. i've decided to retire from acquiring rare trains. i wish to complete my collection and enjoy these toys-for a change-

i'm looking for "the mega set" its a motor rail edition. offered in the u.k and Australia.
any info or offers i'm there.