07MarkLT

What's up everyone? So I'm looking for opinions on tires for my 07 mark lt. Im thinking the open country at 2's. I have a 2" hbs level with the stock 275/55/20. Someone I talked to suggested 305/50/20. Or I read 305/55/20. Not posotive if there's a huge difference but im wondering people's opinions on what would look good. Sizes and tires. Don't want to aggressive but something with a little extra rubber. Thanks for the input