This post is rather old, so this may not help the poster, but it may help others looking for information about these scopes.
I was recently in this debate for a beginner scope, and I chose the Astromaster 130EQ. 5" 650mm Focal Length F5. To be honest, I chose the Astromaster because of it's looks, over the powerseeker. You should never base your purchase on aesthetics, but similar price + similar size usualy = similar quality. But I was very surprised at how well it performs. It has a CG-3 mount, and Celestron has recently released a motor drive for the R.A axis, which is nice. Naked eye, using an O-III filter, I was easily able to see the Orion Nebula (M42) from light polluted skies. Granted not the whole thing, but who can?
Since I have never used the powerseeker telescopes, I haven't any information on them, but it seems to me that the Astromaster series are the 'new version' of the Powerseeker, and they may discontinue the Powerseeker line eventually.
As for what the gentleman above said about the sperical mirror and corrector plate, I don't think this is true. At least not for MY Astromaster. I was a bit scared when I read that so I shoved a pen through my eyepiece, and bohold, no corrector plate. The mirror in the 130 is parabolic.
I haven't got a camera yet (Just ordered a SPC900NC), but when I do, I will post pictures.
I purchased the telescope on sale for $179 from the site below. The price seems to have gone up since, so I'd look around or wait a bit for a sale.
The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift - Albert Einstein