"But how can we add athleticiscim to our backcourt , because we need it. and I think thats all we need to win the East"
I agree with this. If we don't make a trade this summer, I expect us to get someone next season through free agency (we should have more room under the cap next season). However, if we do make a move this summer it will be in the back up department. The trend the last few years are big name players staying with their current teams. So there might not be a deep pool of talent to choose from, look what happened to the Spurs this summer.