A lot depends on your budget, are you looking for 2nd hand or new. My brother in law bought a new Sieg X3 and stripped and rebuilt it before he could use it and with the CNC conversion cost him nearly what I paid for my ready to run Wabeco. The wabeco is not a cheap machine but very high quality built in Germany with a 5 year warranty.
I have an F1210E with the pcDreh software, although there were a few bugs when I first started using the machine I have finally managed to get my head round the program. Its pretty quick to draw your object then you can run a simulation and then make the part. I am still learning but it gets easier the more I do.
You can download the software at www.pcdreh.de