melimine is best on the cheaper end but plywood is better for quality..
sliding glass is better than swinging and no need for a screen top... just use a few floor vents or just some wire screen with a border
heres a pic of my hom built custom tank... its 3/4" ply and holds heat amazing... i actually had to add 2 vents to the top to allow for more heat to escape.. i couldnt turn the bulb low enough
this one gives you an idea on the lighting
this one shows you the side vents
i have lost of pics durin constuction.. my tank is a little costly but here is a link to a custom built cage that i think is absoutly amazing.. built by one of the members here at ssnakess
http://www.ssnakess.com/forums/showthread.php?t=71962