Is this a good trade???

I don't think you should do it. Hamels hasn't won a start in a while because of a lack of run support. The Phillies offense will pick up as the NL East race heats up. Beltran and Atkins both are about the same in HRs and RBIs, while Atkins has the edge in AVG., Beltran will get many more steals. Sheets has been up and down in his last few starts and hasn't pitched against stellar competition lately (SD, WAS, ATL, SF, COL, and PIT). So as I said, don't accept the trade.