I would wait for the super slim (CECH-420x?) that EzekielRage mentioned. When I got my super slim (CECH-4001), I assumed it was of lower nm than the slim i previously had. i was wrong, but at least I got mine on sale (uncharted 3 bundled w/ 1 Year PS Plus for 219.99
)
the upside to the super slim is its super easy ps1 backup swap method (w/o opening up the console), both hotswap and idle (disk spun down) swap even.
downsides: really cheap dualshock rev.B: cheap(er) plastic, L1 and L2 stick (fixed it via an XActo Knife) from poor molding process.thumbsticks felt cheap(er) also. NO CFW
upside: PS1 backup swapping, no optical loader to malfunction and mess up a disk/ never spit it out. | CECH-420x: die shrink/lower nm.