Traditional Bowflex Weight Training Machines
The Bowflex PR1000 model features the traditional setup of bowflex machines in that the bench can be slid up from its normal horizontal position to allow weighted crunched and incline bench press exercises for example. It also features the lat tower attachment (for lat pull-downs) and the leg attachment.
The Bowflex Blaze model also features the traditional lie-flat-or-slide-up bench setup. An important distinction concerning the leg attachment is that the Blaze will allow you to do the prone leg curl whereas the PR1000 won't.
The Bowflex PR3000 model features the vertical setup for Bowflex machines in that the bench cannot be slid down for a horizontal position. Rather, the bench is fixed in an upright position. The advantage it has over first generation setups is that it will take up less floor real estate. Another advantage of the Bowflex PR3000 compared to the PR1000 and the Blaze is that it features a "no change cable pulley system" allowing the user to switch from leg exercises to upper body exercises without having to change the cable.
The Bowflex Xtreme 2SE looks very similar to the PR3000 but has several advantages; the Bowflex Xtreme 2SE comes with more attachments providing over 20 more exercises. The resistance of the Xtreme 2SE can be upgraded to 410lbs versus 310 for the PR3000. Finally, the Xtreme 2SE has a lifetime warranty on the Power Rods. Of course, the Bowflex Xtreme 2SE has the same "no change cable pulley system" as the Bowflex PR3000.
Finally, the Bowflex Revolution FT features the latest generation in resistance technology. Rather than using the flex of the different "bows" to create the required muscle resistance, the Revolution models use a different technology entirely. The main benefit to this latest iteration is that changing resistance levels can be made a lot faster.