Sleeping Dogs for $11.90 (Using the GMG30-DPLIM-DN831 Coupon Code.) plus $6 GMG Credit is actually pretty tempting. However, I did take a look at all the DLC on Steam's product page, and, yeah, that is a lot of content. I think I'd prefer a more complete package, but that is a good price. As usual, I find myself torn.
WOaoly shet, that's a nice code for this. The DLC will later be discounted in a pack of no more than $10 someday.
best bet - the entire collection will end up like a Saints Row 3+All DLC deal for $10-11ish