you might want to consider bonus depreciation over 179. based on the assets you mentioned, the depreciation deduction before limitation would be the same. however, 179 is limited to business income so if there's a loss (or if business income before 179 is less than the 179 amount all you get is the business income amount) you don't get it currently. it becomes a carryforward that you only get to the extent of business income in future years. there is no similar limitation for bonus depreciation. if you dispose of a "179" asset before the end of its useful life, then you have to go through the procedure of computing what MACRS depreciation would have been and recapture the excess of 179 over the MACRS deduction. then the remaining basis gets reported on form 4797 so you get the deduction for any remaining basis. (never understood the reason for this but it is the law)
