If you want to sell studio time, you must have the industry standard mics "that professional studios have" ie. U87, 414, sm-57, RE-20, KM184, 451, 421, D112. But that's purely a marketing thing. Also get one of those giant blue dual-tube CAD mics -- looks impressive as hell (only you'll need a small crane to keep it from tipping the mic stand over and damaging the concrete floor in your studio)
If you want to produce good sounding recordings, the list that Harvey orignally developed -- and reproduced above -- will do just fine.
I would bet that very few people in the world could pick the exact mics that were used on any three top 40 records recorded by 3 different engineers -- especially by the time they were mixed by another three different mix engineers and mastered by three different mastering engineers.
Truth is, I've heard some very good recordings on this board and I've heard major label stuff that's so compressed and harshly EQ'd that in the final analysis the mic selection was rendered meaningless anyway.
There's also something to be said for sounding original -- and that often starts with originality in mic selection.