Bunta, go with the Select ECU. It's a great ECU for the price, and unless you need/want the super advancement of the E1280S, the Select ECU is really what you want.
I ran the E420C (With one of the very first few plug in looms for my R33) and never ever had an issue due to it being sequential.
Oh and you can't beat ease of installation! Run one vacuum line to inside the car, unplug old ECU, plug in new ECU, plug in vacuum line you just ran. Send car to tuner.