Adding a new shell for my 2001 tacoma

I am starting to look at a better setup for my Tacoma. I think with my tools maybe a shell is a good way to go for maximum storage that i can lock up and keep dry. I like the look and visibility of windows. i have to stick with a used one so availability is not all that great. How is working out of a truck with a shell and which ones would you recommend?

Eventually I would like to add like a light or medium duty ladder rack, maybe just 2 bars over the shell seems to be the lesser expensive option. 500lbs weight capacity would probably be plenty most of the time. This is also my only vehicle so its not just for work, ill be taking it out at night as well. Again I'm just looking for suggestions. Id rather spend a little more time shopping for the right shell then buying something I want to replace.

I did find a leer 100xl white fits my 2001 access cab for $550 from a truck cap distributor. Its got a nice look but it does not have the side windows that fold out. I think the folding side windows might be important for accessing tools, or does it not make much difference.

 

If you're worried about access to your bed with a camper shell, maybe a Bedslide is a good solution?
We use them at work. Very handy.

 

I have seem those and they look really cool. The one i saw was built into the truck bed like a fleet option. is it hard to add a bedslide to a shell that did not originally have one? . I am not set on that leer 100xl its just all I've been able to find so far here in so cal. I have been looking for about a week already and I was hoping I would have more to choose from. I'm checking craigslist and all the local shell distributors, are there other good websites i should be checking for used shells?