My suggestion when people pose these questions is always the same one. Decide how much money you could throw at a new pair, take your current pair round to a dealers and ask to demo against new models within budget. If something new impresses you, buy it. If not, walk away with your money still in your sky rocket.
The problem is people don't want to be arsed going to that trouble, or they genuinely may not be able to find a HiFi dealer within reasonable travelling distance, and really what they're wanting by asking such questions is for other forumites to give them definative advice. But the truth is, nobody can.
There. That's your best answer. You will not get a better answer than that, but it might not be the response you consider the most helpful.
Good luck...being on the hunt for new kit (especially speakers) can be really enjoyable.