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.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.