The newer OS cover more than just 2 gb support. You should upgrade to get better memory leakage protection and battery life. The latest Cingular OS is alot better than the ones that the Pearl comes with (unless yours came with the latest one). Just upgrade and you will see the diffrence.
Unlocked 8100c w/ 1 gb microSD, BSE total body skin, and rubberized case or silicone skin.