Yep I went.....Sidey----> Hauler----> Adder---->Cobra---->Asp Explorer and stayed there.......
Because IMHO the ASP is the best all rounder and suits my gameplay.......Some people have multiple ships for different roles...I don't because I tend to flit around a bit and get bored quickly.....
I did try the Eagle and the Viper, but did not like them for one reason or another....
I have flown most of the other ships in Beta and the only one that *Might* drag me kicking and screaming out of the Asp is the Python....
Remember when you do buy a new ship make sure you have enough credits for insurance.....Upgrade of the ships modules and credits for cargo....NEVER fly without insurance.....It will come back and bite you in the arse......
With the amount you have I would say hold off and carry on grinding and taking missions.....Even when you are in a hauler you will still have to grind the trade routes, but your profits will increase....
Unfortunately at the start there is a lot of grinding.....After that...with money in the bank you tend to get more freedom and you can choose your path....
That's my 2 cents.....