I got this horizontal band saw http://www.axminster.co.uk/axminster...utting-bandsaw which I use for chopping up small billets etc. You've got to set it up and keep an eye on it bt it's pretty accurate. Advantage is that it'll cut at angles too which comes in handy and you can leave it going whilst doing something else.

Click image for larger version.  Name: Horizontal_Saw.jpg  Views: 877  Size: 178.2 KB  ID: 14675

If you're cutting lots of 90° cuts then a cut off saw would be better.