Well if you were to trade for a e71...and the others...you would have to spend the remaining to get it.
I am keeping my eyes on a Nokia e71 if I can afford it. Otherwise I would have to take the e63.
I am a Nokia fan.
Check out the spec of the e72...not yet released though. Another great phone.
http://www.gsmarena.com/nokia_e72-2831.php