I would skip on the M-box. All you need is a echo I/O sound card. Fruity loops or reason. Then get you a wave editior like wavelab, audition, or soundforge. You can can get FL4.5, get the beat slicer and the soundfont player for like 200. The echo card for like 150, and if you look around you can find the soundforge 6.0(its up to 7)for like 80 and the keyboard for like 100. Thats only 450 bucks you can still throw in a portable turtable for like 100 and still have money left over. Then later you can cop a sorfware sampler like kontact or Mach five(out on the PC now)Thats the real portable set up