RE: Please help me pick between 2 heli's
Don't worry about building, it's not overly difficult. Just take your time, read the manual, use threadlock on all metal to metal connections, and if you get stumped, ask questions.
Here's a link to a thread of a member who was in your shoes just a few months ago. He went from coaxials straight into a T-Rex 450 Sport and documented the build in this thread. He's now got the 450, a 500 and is apparently looking for a larger helicopter now.
[link=http://www.rcuniverse.com/forum/m_9491255/anchors_9491255/mpage_1/key_/anchor/tm.htm#9491255]http://www.rcuniverse.com/forum/m_9491255/anchors_9491255/mpage_1/key_/anchor/tm.htm#9491255[/link]