The machine you have in mind has a round column and if CNC is your aim will make control of the Z axis more difficult than a dovetail slide square column machine. See the following link for a brief discussion:-
There may also be issues with the ridgidity of the quill and the arrangements for adjusting for wear. Unfortunately the quill tolerances required for smooth plunge action are very tight ad any slop will lead to machining problems as tool ridgidity is an important factor for any mill. The more joints between the tool cutting edge up through the drive bearings and down through the column to the bed of the machine and upto the table the worse the problem. For my money I would be looking for dovetail slides in your price range unless you only intend to cut low density material i.e.MDF - soft wood - foam or wax.
The choice of column is a personal one and is dependent upon budget as well as the type of materials to be machined.
I have purchased a number of Tiwan machines recently and the quality appears to be better than that shown in some of the early posts on this forum. However as with all budget priced machines a bit of TLC is required to get the best out of the tool and I suggest you look at the threads dealing with conversion of these mills. You should also note that there are a number of Far East factories who not only sell machines under their own brand name but also make specials that are available with different specifications. A good way of sorting out the machines when comparing specifications is to look at the weight as well as the XYZ envelope. Hope this helps.
Good luck regrads