suspended ceiling lighting

Hi, I am in process of finishing off my 4 tr old basement.. About 1/2 way down framing.. I have a huge sports card and memorabilia collection I want to display, I have a wall about 10 feet long that I want to build shelves in the wall the most inexpensive way.. I gues this would be sheetrocking over framed shelves, but how would i frame them out, with 2x4's or go smaller? Also would like info on any other type of custome shelve's anybody has built, need lots and lots of idea's right now... Would really appreciate any info.....

Hello - I have a new home that we are going to finish the basement in this winter. I have read alot about not using 2x2's for the walls. Are 2x2's a logical solution to building soffits around the duct work, or should I use 2x4's? My walkout wall is ready to drywall, with faced insulation. Should I still put a vapor barrior over this, or is that what the face does? The other walls , well some are like 7' of concrete with a ledge at the top that. I plan on building 2x4 walls all the way up to floor joists, which will leave about a foot of dead space. Should I "double insulate" that space? (Top 1' already has faced insulation in). I have other areas where the concrete is only 3' high, same question, should I add more insulation to the 5' already insulated? The walls - I was going to use 2x2's where I didnt have drains to get around, but now am wondering after reading on this bb. Regardless, I have no load bearing walls, so I was going to simply use masonary nails on the floor, and nail the top into the floor joist. Do I need to put any nails into the foundation? I have heard that you shouldn't because it can cause it to crack. I have more, but this is already to long! Thanks for your help!