you could be looking around the 220bhp mark depending on numerous things. You would benefit from fitting a larger downpipe and sports cat to compliment the cat back system you have, will help the turbo spool quicker and give better torque gains.
As said above, get a 007p re-circ valve with red spring if your going to map it. Also ditch the magnetec oil and go for OEM recommended oil to prolong the life of your engine. Before remap ensure plugs are in good condition.
As for the leaking injector seal, get a set of new injector seals and replace all off them.