Go with the 3s-gte! It's the easyest to swap, with the most horspower.
jdm 3s-gte engine with transmition, wireing harness, ECU, all computers and sensers - 225hp bone stock wich is a 13 high if you can drive for 1500...
then there are so many affordable and easily found performance upgrades. With bolt on parts (no modification to the engine) you can easily get this engine to perform at 300 hp (Full exhaust, ram air intake, chip, boost controller, turbo timer)