If it were me, I have to say, chemo then surgery. The reason is that then they can actually tell if the chemo is doing any good. In other words, they get to see the cancer respond (or not respond) to the chemo. That is the route that I have gone.... And my scans have shown a very good response. I am now waiting on my final scan results..... I'm hoping for more good news!
Anyway, I really think it helps to know that the chemo, which is harsh, is actually making a difference. Surgery first, and you just don't have any measurements.....
Good luck!