I use a RS309D. The VTA adjustments are easy and convenient.
Get the RS series rather than the AS series.
RS series already equipped with the correct counter weight to cater for heavier carts, whereas the for AS series, you would need to buy another additional counter weight
Get the RS series rather than the AS series.
RS series already equipped with the correct counter weight to cater for heavier carts, whereas the for AS series, you would need to buy another additional counter weight