what do we think of this cross. Looking at breeding our mare to this stallion 

I like the mare's pedigree.  The stallion is nice, although not a full sibling to Rosas Cantina CC, but closely related.  I'd give it a try. 

I'd cry if I had to ride Rosa. Lisa is tough.

huh?

To the OP

there are better DTF sons out there

So how would you choose a stud if it were your mare who would you look at. Just curious 

My opinion....Streakin Jewel is a good broodmare racing sire....so speed there. I'd look at something along the lines of Frenchmans Guy, Dash ta Fame in a sire.