108 Tank Stand

very nice sturdy stand for being your first

Here's mine in case you need some inspiration.

http://smg.photobucket.com/albums/v448/OHardBodyO/?action=view¤t=IMG_7766.jpg

looks good so far,
You could always wrap it with 1/4'' plywood and put some moldings on the corners.
as far as the doors go, you could always buy doors that are already made or if you have the tools and are decent with woodwork you could make your own which are alot cheaper.
it mostly depends on how fancy you want to get.

do a serch on stand builds on here and you will get plenty of stands to look at for insperation and ideas.

I made my own doors...chack my photo album

1. Cover it with 1/4" plywood. Glue alone would probably be sufficient, but you can shoot a few brads in it as well.

2. Layout your door openings. Drill a hole in each corner big enough to fit a jigsaw blade in, and cut the openings with a jigsaw. If you don't mess up, you can use the waste pieces as doors.

3. Make a frame for each door out of 1"x3"s. Allow about 3/4" to 1" of overlap of your door openings. Miter the corners, and cut a rabbet in the back to hold your plywood panel. Glue the plywood in place. This is kind of a cheesy way to make doors, but it's fine for an aquarium stand.

4. Use more 1"x3" or even 1"x4"s to make a molding for the top. Miter the corners, and attach it so it sticks up above the surface of the stand enough to hide the tank frame, if desired. Then make a matching one for the bottom.

5. Attach corner molding to cover the corners and hide the butt-joint in the plywood covering.

6. If you have a router and you want to jazz it up a little, rout an ogee or even a simple roundover profile on your door frames and the molding pieces. But do this before you assemble the doors or attach the moldings.

Looks great so far.
bob965 has some great advice.
You can skin it in plywood or 1x4.
You can use top and bottom trim to hide the nails you used to attach the skin, and also to hide the bottom tank trim.