I've been using a Giant hybrid for nine or so years now, and while it wasn't the cheapest when I bought it, it wasn't the high end one either, and I've been very satisfied.
I estimate well over 15K kilometers on it, and I've only replaced the chain once, bottom bracket and overhauled wheel bearings(and still trying for that perfect saddle!).
It's basically a good bike and while using it for daily commuting in the summer, I've had longer rides such as MS runs (150kms here), and metric centuries, with no problems attributable to the bike (see comment on the saddle).
I'd say get the best you can afford, but from my experience Giant makes a good bike.
__________________
"...perhaps the world needs a little more Canada" - Jean Chretian, 2003.