Can only speak for the A10 goldflash, but mine's very smooth up to 60, gets vibey at 70.
Wardleybob's advice should be taken. Caveat Emptor.
There's two schools of thought.
1. Do loads of research, take an expert with you and buy a sensible machine from someone who knows what they're doing.
2. Just buy the one you fall in love with. Love hurts, but it'll get you through the pain and expense of getting it how you want it.
You've had old Brits in the past so you're no doubt expecting to get some oil under the fingernails, just depends how much really.