K20 swap into an EK = ~$8,000.
Turbo kit = ~$3,500

Also, when considering such a project, there's tons of other things you've got to buy.

Engine management - $1,000
Clutch - $600
Suspension (traction bars, coilovers, etc)- $800-$1,500
Preventive maintenance (New seals, gaskets, radiator, fans) - $300-$500
Other odds and ends (fuel pump, injectors, tuning) - $700-$900

Don't think all you've got to buy is an engine and a turbo kit and think you're done. You're just now getting your feet wet.

I don't know where the LS tranny comes into the mix, but uhh... ok.

EK+B18C1(or C5)=Fun, reliable, cheap, peppy little car.