The Pikestuff items are very good quality, but they're all based on the same few patterns. So it's all about your painting and scratchbuilding skills to give it a little variety.
Nu-Line makes a couple different warehouse kits that are very exceptional; must-haves for anyone with a modern layout IMHO. And their kits, like the Pikestuff items, are very modular and open-ended. Their stuff seems hard to find (I've personally only found their stuff at shows), but Walthers has them in their catalog again this year.