Listened to (the excerpts from) the first two.
I would recommend you put this in the MP3 clinic, as you will get some useful production feedback. Points I noticed in this regard (OT for this forum I know) were that the bass is very boomy and would be overpowering on a full range system, that the mid range is lacking and the production overall is rather brittle, but you'll get more knowledgeable input in the clinic. The vocals could use some compression or fader riding - they tended to jump right out of the mix in places.
Songwise, hard to tell from the excerpts but I definitely liked the harmonies and thought they had a nice feel.