DRSA 1600 with accessories are very expensive and doubt on durability.
I had a co-worked that had both the SMAN3 and the Digicool 1200's. Hands down he liked the Digi's more.
So I went with the DSRA1250's and spring loaded clamps. I love them.
Then the AK900's came out. Dang. Will have to buy a set as a second set soon. Would love to have a set of Digi's dedicated to each refrigeratant. paint to pruge with nitrogen each time I do a different unit.