Here are few I tried to work with when I was looking for a custom build set.
They are listed in order of ease to work with. On a scale of 1 to 10 they are about 6, 3 and 2 respectively. I never bought the steel wheels because of the poor service and the old technology used. These wheels are made from factory type stampings that are lengthen at the bead. If the offset is change much more than 3/8 out board from the factory design there is a potential for rubbing. They change wheel offsets by simply welding the center in a different location in or out. You should assume that you CANNOT upgrade your rotor size if you purchase these type of wheels.
After years of searching and researching steel wheels I put Corvette alloy wheels (and one pair of wheel spacers) on my sleeper so I could use 12" rotors. I DO NOT recommend purchasing steel wheels unless the seller GARRANTEES they will work for your specific tire width, vehicle and brakes! Also you should verify the recommeded rim width for the tire you want to use. http://www.tirerack.com/tires/Spec.jsp? These guys recommend an 8 inch rim width for a p275 width tire! Be careful some of the salesmen will sell you anything, then your responsible for the return shipping, that is IF they have a return policy.