I'd suggest you download the Project Airbus A320 family package, which includes quite a good A321, probably the best freeware one. I'm a huge Boeing fan, but I fly A321s from the package quite often, simply because they nailed it to the head.
About the Spoilers - in the Project Airbus planes, the spoilers are armed automatically before takeoff and landing, without you needing to press anything. On takeoff, as soon as you advance the throttle to T/O thrust, the spoilers will be armed automatically. They will also be armed automatically immediately upon lowering the gear, before landing.
