Sorry but I think the OP was looking for an phone alternative to the N900 within a $200 budget. It requires internal GPS and a 3G antenna.
Although the N95 meets the requirements, I don't think it is the worthy alternative. Because it is a (dumb)phone with many features rather than just smartphone.
I have one atm, and I can tell you after using a smartphone you notice how slow it is, Apps take forever to open. The GPS is very weak/slow even at hot spots. The screen is much smaller (bad for video/app contents) and has no touch-input. It has a slow and featureless web browser that lacks flash, so the 3G factor degrades. As a standard phone its great, just the many features it has, it cannot complete them properly.
I recommend firstly the Motorola Droid, then the SE Xperia X2, then the Touch Pro 2, then the Touch Pro, then the Xperia X1.
If you buy any of these, as an N900 alternative you would be quite pleased.
There are other alternatives as good or better than these, but they arrive in another form (candy bar, Blackberry) factors.
In my books key(thumb)boards, and its addition to the smartphone experience, are not to be underestimated. Especially ones that don't take screen real estate, are large and tuck away underneath the screen (ie slide) like the N900, unlike Blackberry's.