I would stick with the Surly DT and get a new stem for it if that is your only issue. Stem length is going to be different for everyone and if you like the bike minus that issue it is something simply solved. A new stem will set you back $40 on the lower end and usually $200 on the higher end. You can get all sorts of stems from ones with a higher/lower rise to ones that are fully adjustable to all sorts of different lengths and so long as you get the right one for your clamp diameter you are going to be all right.

A stock production bike will never fit most people just right and you will always have to do some tweaking but usually that tweaking is reasonably cheap or can be more expensive if you choose to get higher end components. A cheaper Dimension stem will do the job just fine but a Thomson stem is going be lighter, probably last longer and look a little nicer, is all.