I say go for the new SE only IF you know you can definately sell your current 240 (unless you don't mind ending up with 2)...
Like Chuki_breath said, if it would only take you a few more months after selling it to buy the SR, why not get best of both worlds? which IMO is true! This way you won't have to worry about those little things (or big things) that have been bugging you!