Xakic, Syn took me down recently with Squally. Now you speak of the ship! This is dangerous! Anyway Joe there are several Modified ships in the game, they're very rare and very expensive. I know of 2 faster than an a-wing, I'm sure there are more, but for simplicity and the average man, go with the yt-510.
In system: Sprints and ETAs (old CP) are about the fastest sublight ships you can find, with the sith starfighter (current CP) just behind. All of those are int eh same speed range as an a-wing in system.
Hyper: Fleur is right that a 510 is about the best there is. But there are other ships with similar hyperspeed ratings that are more economical, like the yt-2000.
the YT-510 is about the best combo of both, though, for ships that are typically commercially available. I'd say the sprint is just behind it, but also well worth the investment, as it is cheaper, has a slower hyper, better sublight speed, and the med room, and better cargo and NPC capacity.
neitehr allows you to carry a vehicle, though, do if the 'Derra rules' for ships ont eh ground become a real thing galaxy wide... both will be limited.
Technically an A-wing is dirt cheap. You can produce one for less than 200,000 credits.
If you want one for that price, you merely have to go to New Repbulic and convince them to give you a DC rental!