The 'best' manifold will likely depend on your budget, if you go custom make sure it is from a proven builder, good torque/hp with an even power curve. The DC sports is a budget manifold, plenty of others, and some copies, it makes decent gains even with a 2" collector, it uses cheap flexi though (not reinforced) and will probably fail at some point, sooner rather than later.
K-Tuned have at least three to choose from, others to name a few, RCrew, SSR, Hytech etc.