ISIS rules. No creaking, flexing and wobbling.
I've heard loads of bad stuff about the ISIS interface on the Middleburn cranks.
I'm running Tensiles and FSA Plat. Pro BB, no problems. Non-driveside crank came loose for a bit, but now it's firmy stuck there. Works brilliantly!
Can't you get Tensiles in 165 mm nowadays? (Yes, you can, here.) I'd get Tensiles over Middies to be honest.