I see why you are having a problem making a decision.
All get good ratings from reviewers.
All 5meg and priced pretty close.
Try taking a look at the specifications side-by-side and see if anything hits your eye:
http://www.dpreview.com/reviews/compare_post.asp?method=sidebyside&cameras=canon_a95%2Cfuji_finepixe510z%2Chp_r707%2Csony_dscp93&show=all
I did note that the Fuji has a wide angle lens if you have need for such.
The Canon and Fuji offers more manual controls:
They have Aperature and Shutter Priority.
The HP has Aperature Priority only.
The Sony has neither, but has Manual.
...
..
.
I have been looking for a DC for a while and have come up with theses:
Canon PowerShot A95
Fujifilm FinePix E510
HP Photosmart R707
Sony Cyber-shot DSC-P93
I have looked at the reviews for each DC, and they all have a good rating.
What I am looking for is a DC that has the option for point and shoot but has manual controls. with a reassembly fast time from power on to first shot.
any suggestions, or another cam that would be in the
$500can price range.
Thank you

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic