Where we should host our site? Which company will be the best?

We are operating a scientific journal site which have users from Africa, Europe, Asia with little user base from USA. We are presently hosted with digital ocean Singapore DC, it serves nicely to India, and certain parts of Asia but not to farther places, users face problems in downloading speed and site loading speed. The main problem we face is the download speed which is required while downloading the pdf file ( each file will be of at least 3-5 MB size) is not available if we go for low cost over sold VPS. We are thinking of moving our site to a new provider who provide good download speed. Also we are searching the company with few things in mind which is mentioned below

1) We are not so learned concerned with Linux, but we do have experience in handling a VPS with or without control panel, have less time to sit and learn Linux stuff but forced to manage the VPS. 2) We love the snapshot feature of DO, this is not available with other providers, will it be better if we chose another DC of DO itself and move the data there? Will Amsterdam serve its purpose? 3) Is there any companies who can provide a VPS with good download speed at affordable cost, we are ready to spend but we dont want to go for a VPS which will be overkill. Our sites will take less than 200 MB RAM, 2-5 GB bandwidth per day in average, CPU load on a 2.5GHZ CPU is never above 0.4. 4) Support should be fast enough. 5) Our budget is $5-$15 per VPS, we can spend more but we feel that its not required owing to the reason that our sites does not even use a database and they are simple html+pdf sites. 6) We think of Vultr.com but their Terms of Service is so rigid which we are apprehensive of with our novice knowledge related to Linux server management. 7) We tried Linode for a while it works nicely but the snap shot feature is charged at a high rate, in DO its free till date 8) We dont want control panel for the server, we are highly comfortable with VestaCP and it does the things we need.

Requesting users to give us suggestions on company we can try, datacenter location we should try, technology we should try ( Openvz, KVM etc), expectation are high.

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