I got a Tri-cross with Tektro mini Vs with STi shifters. I hated the fact that I had to run the pad so close to the rim to get good braking. So, I tried froglegg style cantis with a kona fork mounted cable hanger and by comparison, they were far too wooden with not enough actual power although a lot further from the rim.
Then I tried "Shorty" style arms and found the middle ground, kind of a mummy bear situation. Some where between the two for power and somewhere between the two for rim clearance.
I've now settled back on the mini Vs. The brakes and rims need a little more fettling to keep everything working perfectly but I think it's worth it for the extra braking power.