situation: i am forever wanting the same information at home that i used at work all day long. anything from emails, to files, to projects i am working on. to give you the background i have been using a mac pro @ work with like 6gb of memory, a mac pro at home (early 08 eight core) with 12gb of memory. so i have no shortage of speed at either location. what held me back so far from using just one macbook pro was it's drive space (measly 100gb seagate drive) or so i thought. now there is a new drive in town - enter the Hitachi k500 500gb 12.5mm drive - suppose to fit my MBP 17" perfectly. i have a first version macbook pro that sits on a shelf. over the weekend i decided that i would attempt to cram all my work data on to the new Hitachi k500 500gb drive so i cracked open my macbook pro and installed one, loaded it all up with my stuff, and headed off to work on monday. i have plenty of room for my data but it became glaringly obvious that a macbook pro is no mac pro. i am one of these guys who may have literally 15 to 20 program windows open at any one time and my machines are always doing something. i am now faced with making the decision of - is the portability of the macbook pro worth the performance hit in stepping down from a mac pro. where is the performance bottle neck? is it the proc's? HDD speed? or dual 2.16 cores? 2gb memory limit is my guess. i am waiting for programs to open, screen draws, beach balls, the works. to read the forums there seems to be a thought that new MBP's are on the way. will they still have the current 4gb ram limit? will the procs or other hardware be fast enough to erase the performance gap i am feeling now? or should i just resign myself to having two sets of data that i sync as needed. please give me your real world experience from those who have done similar.