I currently have a 2 x 9 Middleburn on a Cane Creek Isis crank, that I love. On wim I purchased a newer from with BB30 and feel this may stiffen my bottom bracket. So I've looked at a few brands and the X9 BB30 appears to be a decent option, price seems about right, it is reasonably light, but not at light as my former setup, and maybe not a stiff as I may want. Hence my question to the board - I know I can convert an outboard BB, but then weight is added - this is my race bike and could like to save if I can (yeah I know it's in the BB). Race Face and FSA top end out board cranks sets are super expensive, perhaps there are some other thoughts out there - ideally XO BB30 would be my 2 x 9 choice but is $500. So what's my budget...? somewhere between X9 and X0...thanks in advance.