Can't remember which thread it was in, but someone (maybe @bickster) recommended steaks from Aldi recently.
I love a steak sandwich, and to be honest with you, the cut doesn't matter too much when it's going between bread, as long as it's relatively tender when cooked properly.
Picked up 4 pre packaged, already rubbed with chimichurri for about £6, maybe less. Absolutely superb, onions cooked in garlic oil, a spread of grainy mustard, a soft roll. Could've had a bit more spice on em, but I think I probably burnt half of it off. But for the money, 3 belting sarnies. I shall be going back. Thanks Bicks.