What is the next guitar i should buy?

I currently have a Fender Strat (mexi) and i'm looking to get an acoustic guitar. I have been playing off and on for 6 years or so, and im looking for something of at least comparable quality. I am thinking of spending around $500. Should i be willing to pay more? Definitely won't spend over $1000. I'm not against buying something used either. I prefer a bright sounding guitar, rather than a bluesier tone. Any suggestions model wise would be greatly appreciated. Thanks