tmmorris,
the p3 is extremely good value now - due to be discontinued soon I believe. This is what I use, and find that the screen is plenty big enough in real world use, and the whole unit is nice and compact compared with most of the others.
It has so much functionality, that you can tailor your readouts to suit - I thought before I got it that I'd use it for lots of things, but I find that I only use it as backup to sanity check my location and heading to destination - it has saved me those 'where thefkar-we' moments. From the comments above, it seems that most use GPSs in the same vein - so why pay more for something bigger, bulkier, and no more 'real world' useful ......
A