A stock craft made of 54 parts.
It is a LiquidFuel-only spaceplane with a range of 800m/s from launch. However when fully fuelled, the range is 3km/s. It carries 6 kerbals and has a Mk2 dorsal docking port.
Updated in 1.7.3! Now with better handling and a better flightpath! Once you get past 400-500m/s, you should pitch up slowly to about 20 degrees. This will let you get an Ap above the atmosphere quite easily. I circularised with 1000m/s to spare.
Built in the SPH in KSP version 1.7.3.