I'm new to StackExchange so I'm not sure whether this should be a comment or an answer...

Watching "It Might Get Loud" really changed how I view instruments - there's a segment where Jack White builds a guitar from garbage, basically, and it sounds great. 

I think what's important here is WHY do you want to upgrade? Have you learned how to do everything you can with your current guitar? What will upgrading get you? I know I've gotten sucked into "ohhh pretty guitar" moments, urges to try something new, but will that really be beneficial, musically? Do you really need that "better" tone, especially if it costs $500, $1000, more?

Even a $100 acoustic can make music that sounds good (subjectively), so before you go for an upgrade I'd take a good hard look at your reasons - maybe you just need to explore a new style of playing.