I haven't figured out my limo yet, but I did a TON of research for my friends bachelorette party (for a party bus) and we ended up with the following companies....
Elegante Limousine
Delaware Valley Limo
big League Limo
Hollywood bus and limo service
Limo Today World Wide Transportation Services
Mid-Atlantic Limousine
We ended up choosing Elegante because they had the size party bus we wanted with the best price. Like I said, I'm not sure what their actual limo prices are or their hours of service. They were really easy to work with.
They did arrive a little late (30 min) actually because my house is confusing to get to, so if you were to use them for a wedding make sure they know where they are going. We werent too worried because we were partying at the house while
we waited, but a wedding would be VERY different.