To show off clothing, I think Aeon Soul, aka Alfa Seed, aka Aery Soul, etc has some of the best promos. 

Several shots showing a model wearing the clothes to give a clear 360 degree view.

Shots of the clothing put together in a number of different ways.

If there are additional textures, each one shown with its own shot, in close-up.

A bunch of untextured shots.

More than a few artistic renders.

If you haven't already seen them, take a look at the Skylys promos over at RDNA to see what I mean.

I certainly wouldn't expect this kind of treatment for everything I might buy. But it is impressive to see.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.