I have been using Meirhosting for several years now, and find them to be a perfect host. Whenever I run into any troubles ( usually caused by myself ) the support is excellent. I have IDNs hosted with them and have no problems with the sites.
I have a "reseller" account with them that allows me to addon as many domains as I want to. Resller accounts with them start at 6.50 GBP per month. You could probably find cheaper hosting elsewhere, but for me, I am more than happy with the service, especially with the support - I have never experienced such great support anywhere else as I have at Meirhosting.
You can find more info here - http://www.meirhosting.net