Both are allowable in aluminum, but each has its own acceptance criteria that you must wade through.and a forum such as this couldn't possible give you all you need to know for that. You have given factored loads, so I'm assuming you want to use the LRFD process rather than the ASD method. As JC noted, there are many nuances to aluminum and you've asked for 'allowable' moments, deflection and shear, when in fact you need to compute the actual moments, deflection and shear and compare those to the design criteria given in the Aluminum Association Aluminum Design Manual (ADM 2005 or ADM 2010).