From someone else on the board that answered this question for me:

"Unless you really want to measure cadence, have 2 trip odometers, know what the temperature is outside, and ride in the rain and snow (a waterproof model)...the $12 cyclocomputer sold at X-Mart will suit just fine."

Thats what I got...I figure when I upgrade my bike down the road...I'll upgrade that too when a little extra green becomes available. For now...I'm content with what I have.