Nothing wrong with Apple refurbished units, used your better to know the usage and some models are best avoided.
Difficult as I don't know your local market, for smaller portables personally I like Samsung as the build quality equals and can exceed Apple (not the low price models) Dell XPS is another option and they are expandable RAM & storage. Others are Dell Precision, HP Elite Books & ThinkPad`s, however price escalates accordingly, Desktops Lenovo or HP, better to build one and taylor it to your needs.
As others using the applications that you plan to have made recommendations and the 13" works follow them, just be mindful on storage, 256 is a minimum, needing to use an external drive constantly will get tedious very quickly.
In your case I would set a budget and stick to it, purchasing the best hardware for the money, also consider extended warranty preferably with accidental damage as an issue a couple of years down the line you want to be covered, or you will be another $3K out of pocket, and no I don't recommend Apple Care as it`s a very limited product, skewed far more to Apple`s benefit than the customers.
Truthfully there is little benefit in getting a Mac for your needs apart from just wanting one which is perfectly OK, equally you want the best package for your money that will serve your needs, which includes service and support etc.Apple is generally good in this aspect, equally with no official outlets in the country it can be difficult in the event of a hardware issue to resolve.
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