It's your car jimmykool111 and make it how you like but honestly I wouldn't get a single exit exhaust. Imo a true dual system is the best type to get.
All depends on your budget, what look & sound you're after though.
Just take your time deciding as I've seen lots of members buy exhaust systems and then they don't like it because it's too loud, or it drones on a motorway, or they heard one they prefer more etc etc.