thanx for the answer
in 90% of the TOS of VPServers you can read that you're not alowed to run gameservers. so yeah, you'd need a real dedicated, and not a vps.
Concerning the ram again... 4gig is way too much.
the first dekaron server i ran (difference) had exactly 1 gig ram. i had up to 150 people online at the same time. there were no lags or anything.
If ya got 2 gigs, it's ok as well. but i guarantee you, that you won't ever need more then 2 gig of ram.
In case you got 4 gigs, you couls always install the database server on the dedi, and install some kind of virtualisation software, and run 2 other dekaron servers virtualised á 1.5gig ram each. (did this as well).
You need to have in mind, that when these server files were created, the +/- performance of dedicated servers were about 1gig ram and a singlecore á 2 ghz. not more

there surely were more servers running the single exes (cast for one, game for the other and maybe login for another). fact is, that well known private providers also had their server files running on machines with 2 gigs of ram. and nobody notices it
the cheapest servers you can get are servers from germany.

you're also alowed to order them even if you're not living in germany.
since germany isn'T that "old" concerning technology, i guarantee you, that you'll have a quite reasonable ping even if you're living in america.
Level3 and TeliaSonera are the most common connections to outside germany.