I understand you want to stay with a host in your country.
Still, I am using
http://www.infomaniak.ch in Switerland, altough I am in Japan. They have excellent hardware, great support (including by skype) and I virtually had no problem with more than 10 years with them!
You get 50 Gb for your web sites, unlimited email addresses, unlimited bandwidth, .com domain fee is included if you want and of course free support, including in English. For 140 euro per year, so about 200 US$...
Big companies in Europe are using this host, so I guess that even very large forum should have no problem...
sanji
[img]http://www.secret-japan.com/forum/images/banners/fuji%20secret-japan%2088x31.gif[/img] [url=http]Secret Japan[/url] : discover Japan off the beaten tracks