Oh, if you love your baby, don't do it. A Kitchenaid...I know your pain of wanting to bring it.
My own experience is that a transformer will give you one week of pleasure, a sudden "pop", a whiff of plasticy-smelling smoke for about four hours, and the rest of a lifetime sitting and looking at a dead appliance.
They may have improved things, but for me and transformers? I look at them and make an "X" with my fingers/arms outstretched.
A base price for a Kitchenaid here is roughly £279 (inc shipping); £479 for the steel. Buy one here, bring the attachments...that's my I-know-nothing-about-electricity advice.