737 DCA FO runs junior I believe.
320 DCA is an International bid status, if you want that.

Otherwise, having a mainline jumpseat for Commuting is great to have. PHL is a bigger bid status, but no 737 in PHL. Should give you more flexibility being in PHL with mainline commute and bigger bid status, even. if you moved up the list a little slower. Also, another thing to consider is that DCA trips tend to be shorter than PHL trips. PHL has more 4 and 5 days. DCA has higher % of 3 day trips.