I agree with Adriano on this one, many ppl swear by the standard manifolds with a little work.
I think you need to work out your power goals, you sad you don't want massive power, but your talking disco potatoes x2... single dp turbos make pretty potent power, let alone two of the suckers.
If you end up sticking with the stock manifolds, Id look at the HKS turbo kits like the GTSS, which are bolt and have all fittings,gaskets etc(unlike their Garret counterparts).