Having acquired a used Deck Legend recently... I do like the extremely sturdy (and big) PBT case of the current series.
It seems that Deck is really going after Ducky with its new LED options. Hell that keyboard looks like a Ducky with the completely overhauled case profile. It is surprising though that TG3 has waited until 2013 with easy availability of Asian LED keyboards on the US market (Ducky, Vortex, Keycool...).
As for keycaps, if the two-piece keycaps aren't an issue, they are the best backlit caps available.
What I'm most curious about is the price. The current antiquated Legend line still ask $180-ish for the 105... I can't imagine that a new revamped Deck will be priced more than that unless they want to be railroaded by $130 range Duckys and cheaper yet Keycools.