Hi,
As one who has done both Eharmony (twice) and pof, pof in my opinion is much better. It's free for one. Also with pof you have control over who you interact with from the beginning, you don't to rely on someone else to match for you. You also get to interact with local guys. I didn't realize there were so many local guys in my town looking (you'd never know that with Eharmony)! Having said that when doing pof you still have to be specific, for example if you're looking to date causally then state that up front, on the otherhand if you're looking for a long term relationship and you don't want people who are only looking to hangout or causally date to contact you then state that too. This way you and your potential contacts know where each is coming from at the beginning. Having said that, of course there are jerks on the site;they're everywhere, but there's also a lot of good guys there who are really looking for relationships. I think that no matter what site(s) you end up using, it all comes down to the written profile, if you read them carefully you'll be able to get some intial insight into these guys and they you. Uploading a photo is a must. I think this is reasonable; just like we want to have a visual, so do they. I am currently communicating with a man that I met on pof (after only having been on the site for 2 weeks) that's very promising.
good luck and keep us posted,