iq8 - again as far as I'm concerned but some will like it
Your biggest domains in order of main preferences
winagrand
limostyle
iq8
netcoll
You would be on a winner for winagrand if you could develop this and get the traffic you could make a lot of money from it.
Limo Style is 50/50 on if you could use this for a limo hire site but it would be down to what the person could do.
Deffinatly winagrand is your best, this has a lot of development potential and its a sum of money that can mean a lot to someone but not be over the top such as winamillion say, it would be more trustworthy.