If money is no object, go for the most expensive one in your budget range. It is like why drive a honda if you can afford a Lamborghini?
I like this one because the answer is easy; For the quality.
Our whole family drives Honda, among them some very old ones, and we never had to go to the garage for any defect with any of them.
The Lamborgini has "built in defects" being built in Italy.
And perhaps this answer counts for stringing machines also: Better buy a high quality drop weight than a lower quality electronic from Asia.