Wales No.8 Gareth Delve has admitted his international recall could see him turn his back on the chance to join Melbourne Rebels.
The Gloucester captain has been in negotiations with the new Super 15 franchise about joining them at the end of the season.
However a move Down Under could end his hopes of playing in the 2011 World Cup for Wales.
And having earned a rare start against Ireland at Croke Park on Saturday because of injured to skipper Ryan Jones, the 27-year-old now faces a huge dilemma.
"I am still in negotiations, but I can clarify that I haven't signed for anybody," said Delve.
"In terms of negotiations, the people I have been speaking with I have been speaking with for a little while now.
"I need to make decisions based around the future as much as the present.
"The World Cup is a huge draw. I haven't had the best of times with World Cups in the past, so the chance to possibly make one would be fantastic.
"I have been in the mix for the previous two World Cups and picked up injuries just beforehand.
"These (career) decisions have got to be based around fantastic opportunities that present themselves, but also big sacrifices.
"Some of these decisions are based around opportunities I will never actually get again, and that is what I am weighing up. That is why it is taking so long to come to a conclusion.
"Certainly, the World Cup and international prospects weigh massively on the side of staying here.
"I am seeing this for what it is. I have been called into the team this week to perform against Ireland, and if I do that then hopefully there is another chance for me the week after.
"In terms of international aspirations, I spent a long time maybe feeling a bit disappointed that while being involved with the squad for a long time I had never quite got that chance, that start.
"I have got a chance on Saturday that I am hugely looking forward to, and it is a case of looking at everything from a pretty wide angle and seeing what would be the best in the long term for my whole career."