Sorry for disappearing, been busy traveling for the past month and didn't get a chance to look at this thread.
Based on what I've read, I've decided to go with the Unicomp. It should provide a similar typing experience as the Model M, is built like a tank, and is cheaper than the topres. I still like the HHKB for its layout, but I can't justify the price difference between the two just yet. Of course, in traditional geekhack fashion, I'll probably end up owning all three keyboards eventually, but the Unicomp will be a good one to start with.
Thank you everyone for the help, and I'll let you guys know how it goes.