Truck Bed Accessories?

Hello,

I'm currently looking for a truck and just wanted to plan ahead so that I
can take full advantage of its capabilities. For my needs, I'd like a
covered truck bed (dry and secure) that has easy access to its contents.
However, there are times when having an open bed would come in handy for
moving bulky items.

There was a product shown at www.slidesystems.com which allowed for easy
removal of a cap from a truck bed. The site used to have information posted
on it, but now appears to be "Under Construction" for quite some time now.
Does anyone here have any feedback or info on the product or its status? Any
similar ones out there?

In trying to find a similar product, I found Bedslides at www.truckchamp.com
but they only allow for easy access to the contents inside the truck cap and
not removal of it. Not a bad idea though.

I've also seen the hard fiberglass Tonneau covers and spoken to a few owners
from time to time and they tell me that they are secure, and yet also easily
removed. One of those may be a possible alternative to look at as well. Any
pros or cons?

Thanks in advance to those who post a reply here.

Peter.