Load testing

Dear Members, I wanted to get one of our websites to be load tested. This web application have feature to upload / download excel data and reports etc. Due to heavy data load we just wanted to test it for 200 concurrent users. Person having knowledge on loadstorm would be preferred. All other basic tools to measure CPU Usage, memory usage etc. also need to be run and proper reports would be required. Once this is done on time, we have more than 200 websites which need to be tested using the same tools. Thanks.