Between those two it's a no-brainer. The Variant 3's all the way, for the simple reason you can play with them and not find yourself wanting more damping, but unable to get it like you currently have with your Roush stuff.... Sure they cost more, but it's less than replacing them down the road a second time. Changing spring rate is not a substitute for changing damping rate and vice-versa. And the V1's not being adjustable can't deal with much other then what they were intended to handle--which is what they come with, and even then there is no guarantee it's what you'd like. I mean someone thought every shock was right for a job, from the OEM Ford stuff to the FRPP's and on and on.
I don't know what your good deal is, but FWIW I have V1's for $1380 shipped, V3's for$1939 shipped, which is a difference of $559, not $700 (but it is $700 or so retail difference.... I just don't sell them for retail).
7x SCCA National Champion + 7x SCCA ProSolo Class Champion, 2009 SCCA ProSolo Overall Champion
I drive them, I compete in them, I sell more variety of brands than any other company.