Tonneau covers? Alarms too?

Hi all!
Anyone know what tonneau is good? I need to keep my tools out of sight. Can't use a hard cover, need the bed for dirt and wood. Is there any that can be locked?
Need to know what is a good aftermarket alarm to put in too.

Thanks, and I hope I can help some of you in the future.

2002 Pre runner Xcab. 4X2.

Steve

I've got a '02 Tacoma Xcab and I have a Pace Edwards TracTop tonneau cover on it. It is a hard cover, but instead of lifting up on gas shocks, it slides back in 2 tracks on the sides of the bed. It lies flush with the bed too, so there is nothing bulky sticking up above the bed. Check it out @ www.pace-edwards.com :alien:

I was thinking of getting on of those Pace Edwards rooll top covers.
How far into the bed do the "tracks" stick out. Would they end up getting bent and stuff. I am in and out of the bed allot, with tools and all kinds of stuff. For now I just got a tol box... Thanks !!!
Steve