KP,
Frankie beat me to it, but yeah...I have a Sole F80 model, and honestly, I am extremely happy with it.
It's got a long and wide belt (as far as treadmills go). Speed available from, jeesh, I think .05mph (don't quote me on that) on up to 11 miles an hour.
You can run on a flat area, or with an incline (and the incline can get pretty steep if you want it.)
The display is easy to read and reach. Also the incline and speed can be "bumped up or town" by buttons on the handrails
Technically, it's a folding treadmill, though I leave mine in the unfolded position at all times.
I don't use the heart rate monitor, so I can't comment on that feature.
It does have several programs you can use too, but again, I typically just go with the manual choice, and bump the speed up or down as desired.
Radioyada also said that assembly wasn't bad at all.
You can order directly from Sole, if you're interested:
http://www.soletreadmills.com/details.php?name=F80
If you do, note that they have "drop shipping" and an "in house" (not the right term) delivery. Drop shopping literally is curbside. It doesn't matter if the curb is ten feet from your front door. The curb is as far as they go. So.. either go for the in-house delivery, or make sure that you and at least one other person can pick the thing up. It's a heavy mofo!
This model was also avialable at Dick's Sporting goods for a while.
Happy treadmill hunting!