By Bob Semro Colorados Health Benefit Exchange is on schedule and heading for a successful startup on Oct. 1, 2013, top officials told lawmakers on Thursday. On that date, Colorado citizens and small businesses (with 50 or fewer employees) will be able to easily compare and shop for affordable health insurance coverage in a brand-new online marketplace. The exchange is a key feature of the Affordable Care Act and is designed to help more Coloradans get insurance. Through the exchange, Coloradans will be able to purchase insurance with the help of federal tax credits. One goal of the exchange is…