Ray and Wallace for Iggy and BrandWhy for Boston:We get Iggy who can become part of our core for years to come along with Rondo and Perk
We get a legitimate big guy to join a rotation of Perk and KG in the front court, who can even play Center (despite being undersized).
No more worries about bad shot selection from Wallace

There's a chance Ray gets waived and we get him back
Why for Philly:Shed two huge contracts to free up cap room to become major free agent players. Yes, Wallace still has a couple of years, but at about a third of what Brand is making.
Yes, Brand has 3 more years, but I think the demise if Elton Brand is overrated. I think he is solid all round, and seems to be getting his game back after recent injuries.
My other concern is we lose 3 point shooting, but I still do it. I'd even throw in a first if necessary.
Thoughts?