Re: My Jamison-Dalembert 4 Rashard-Pryzbilla
It really depends on format. How much does your bench play? Rashard is considerably better then Jamison, although Jamison is underrated.
If the bench isn't much of a factor, then you're definitely upgrading your starting lineup. The drop off from Dal to Ratliff isn't that much, and Troy Murphy is an interesting player as well.
However, saying all that, Cotton Camby is your C, so having a solid backup C in Dalembert might prove very valueable. Due to that reason, I think that you might want to hedge against injury and keep your team as is. If you are winning weeks as is, then no need to risk it all.