"... then letting AS bid what I feel is the maximum I would pay?" - Why place a proxy bid? If you have a maximum that you are willing to pay, then what difference does the reserve amount make? Are you saying if the reserve amount is more than the "maximum I would pay", that you are willing to increase your "maximum"? If that's the case, than it's not called a "maximum I would pay". You could say, "the maximum I would pay, unless the seller wants more than my maximum, then I'll let the seller tell me what my maximum is".
I'm not trying to be picky nor give you a hard time.