Before I try to answer the "should", I can tell you that you certainly "could". I have lived and worked in DC/NoVA area and there is definitely possibility to get more. But coming back to the point about "should", you need to ask yourself the following questions and assess your situation:

1. How critical is your position/situation at the current company ? Is it possible to have a frank discussion about salary with your manager and see where it goes ?

2. Have you tried looking outside just to get an idea of how much someone is willing to pay you ? With 2 years of experience, 75K is not a bad number necessarily but again I know a few 2 years experienced Java devs making more than that.

Bottomline is that it comes down to whatever you can negotiate. Pay attention to the word negotiate again. Thats what it really is all about. If you don't try hard, your employer will obviously not do charity even if they love you. So go out there, talk to current employer and look outside at the same time. You will know where you stand.