concertina door dilemna


I have 4 sets of concertina/folding doors to order. Spans are 2m and 3m. I am faced with a choice of buying very expensive imported German fittings which cost about 1000UKP per set, so that's 4000 UKP for the whole house or a cheaper one which costs less than 100UKP each set. Clearly I don't want the doors to jam all the time or give me huge headaches but do I really need to spend the money on these top quality ones? I should mention that I live in SE. Asia and there is a choice perhaps to get someone in UK or USA to send over to me if the advice here is a brand which is readily available and good in either of those countries. Many thanks for any advice here.
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