WITW will always be my favourite I think. Although the production is rather lacking in comparision to MF and especially TGE, at least it wasn't overproduced. MF I think had the perfect sound whereas TGE was incredibly crisp, but the instruments didn't flow as well together as each instrument was too distinctive for its own good (If that even makes any sense). Perhaps it was just the mixing and mastering?
As a DT fan who much prefers the production on Images and Words compared to the post-2000 releases, I think I just much prefer the humble production values of WITW (Not to be mistaken with the poor production values of Become). I don't think the songs are as well written or cohesive as the later SW releases, but there is something special about Waiting that i'm not sure can ever be replicated by the band without trying something radically different with their sound. As it stands, I can only assume that SW 5 will have top notch production and sound identical to TGE.