cc or revo will give your motor a good kick.. so 6th pulls like 5th does now, which is what i guess you are after. Wall of torque to shove you along.
mrsB lupo running k03s on revo shoves 250lbft torque. same turbo as on your leon
revo offers a trial version so you can try before you buy and see if it suits what you are looking for.
Custom Code equivalent is less aggressive, more factory like powr delivery but more of it everywhere.
if switching it on/off, or adjusting appeals, then revo has this option via their select switches.
give me a bell if you would like any more info etc
regards
bill