Root canal on upper molar - advice wanted!?

This week I had a root canal on an upper molar. The procedure was quite expensive but luckily painless. Right now the tooth is filled with some temporary material untill next week where I will get permanent filling (plastic). The dentist says he recommends I have it crowned in about six months. But it is VERY expensive here in Denmark! Obviously I have the option to have it crowned in one of our neigbouring countries, but I like my dentist and feel safe in his hands, so I am not crazy about the idea of paying loads of money to have another dentist in a foreign country do it.

Therefore my question is: Have you had a root canal on a molar? And did you have it crowned? If not, how is your molar doing now, and is it even possible to go without the crown?

I am 27 years and therefore I obviously need my teeth to last for many years to come. Hope someone can help me make the hard descision.