Best place I've seen to buy quality steaks out in the burbs is local butcher. If you don't have a local butcher or are looking for economic option, then CostCo has good quality cuts for 1/2-2/3 the price you would normally expect to pay. If I'm cooking I prefer Ribeye because of marbling.
Cooking steaks from refrigeration - season with salt and pepper on both sides, set out to warm closer to room temp for 30 minutes. After 30 minutes, put a quick splash of oil in a pan, bring up to near smoking temp. You want the pan very hot. Quickly sear the steaks on all sides then add butter to the pan, along with 4 garlic cloves and healthy amount of thyme. Continually baste the steaks with your garlic+thyme infused butter and a spoon, while constantly turning to evenly heat the meat. If you don't continually move/stir the butter it will burn in the hot pan. Judge "doneness" by touch. Once your steak is medium rare, but before it hits medium (don't want ribeye too rare or teh fat wont completely render), remove yours to rest for 10 minutes. Put the pan with your wifes steak in a 400 degree oven for 15 minutes because she's a Chinese heathen who won't eat steak unless it's medium well or worse.
If you're in the city, Bavette's is the best steak I have had, followed by Smith & Wollensky's and Chicago Cut (haven't been to Gene and Georgetti's yet, though). Don Shula's is the worst "top tier" steakhouse I've been to in CHicago (i've been lucky enough to go to most); I've been there twice, Paddy drunk both times, and have twice left disappointed. I'm an easy audience when drunk, but Shula's just sucks.