In reply to drolex:
Lots of gyms have them now. Might be worth visiting one to have a heft and see what weight you think might be best.
They're a great tool for training btw. Once you get into them try the 5 week 10,000 swing KB program. It's also worth getting a bit of tuition for how to use them, many of the exercises are quite ahrd to do properly.
Turkish get-ups, swings (Russian and normal), snatch, C&J, weighted pullups/dips, and squats can all be done well with them.