Here's a way to get ceiling access in the basement without the look of a large expanse of suspended ceiling. The approach is to put wooden caps that act as "exposed beams" on the bottom edge of the ceiling joists, and then put removable ceiling tiles between the joists.
Each beam is made of 3 pieces of 3/4" lumber nailed into a "U" shape so that it slides over the bottom edge of the joists. The beams should be leveled and nailed to the joists. The ceiling tiles will rest on the top of the lip created by the beams. You will need to run suspension track every 4 feet across the beams, flush with the top lip, to hold the adjoining edges of the ceiling panels.
This gives you an exposed beam look and allows you to remove the ceiling panels so that you can run all those wires for your home theater.