I've been looking for some decent trimmers for a while now and found that the Wahl Icon clippers are pretty cheap to find in the UK (on ebay). They cost around 60 quid but that's cheap compared to the Netherlands (120 euro's vs 85 and the one from UK has more accessoiries). They have a very powerful motor which is one of the most important factors when looking for clippers.

I usually cut my own hair and beard and most clippers/trimmers that you buy just don't cut it (literally and figuratively). A lot of them just end up tugging at your beard. I've also read very good stories about Oster 76 clippers. In any case, invest a bit more and get professional grade clippers instead of those market to the normal consumer market. Price difference usually isn't much but they will last.