If you download the VRP's the only real difference between the 296 and 495 is the 495 has a faster screen refresh and has selectable airspace based on altitude.
The 496 has the crappy (if you have used something like tom-tom) road navigation as standard. But this can also be added to the 296 if required.
You can pick up a 296 for less than £500 on ebay.
Ex Rans Flyer Web Site:
Flight For Life