ETX125 vs Nexstar 5i

I am planning to buy a computer telescope and still can't make decision
between ETX125 and Nexstar 5i. I heard from many newsgroup and users in my
place that Nexstar 5i has better optic. But I am attracted by the autostar
system and is ability to upgrade by myself. Anyone can give me comment about
these 2 telescopes and in my place Nexstar 5i is about US$200 more expenisve
than ETX125.
Thank you very much!!
Clear skies~~