VPI Aries - either or question, please comment

I have a credit and can buy either option 1 or option 2. Any help?

Thanks in advance.

OPTION 1:

- VPI Aries turntable w/ JMW10" arm (~$3,700)

OPTION 2:

- VPI Aries turntable w/ JMW9" arm (~$2,600)
- VPI SDS (synchronous Drive System) for speed accuracy (~$1,000)
- $100 for the extra cables needed.

I guess the question is simply, how good is the 10" arm and would the 9" arm paired with the SDS better it?

Thanks!!