I don't have any expensive guitars, with my Cordoba being the highest priced at $1,000. Neither the price tag nor the brand name make a guitar necessarily "good", but rather the construction, the materials used, etc. I think it's important to learn about these things so an informed decision can be made. From there, the fit and sound make the difference. My ears tell me that an all-solid-wood acoustic sounds a lot better than ones made partially or completely of laminates. That usually increases the price, but to me it's worth it for the full sound and overtones.
I have to give a "shout out" to Epiphone. These guys make some seriously good electrics at affordable prices, and often with many of the components that Gibson uses. The finishing may be slightly less pristine, but that's just cosmetic. My first all solid-wood acoustic is my Norman, bought in 1973 ... still has a great voice, and nice wide neck (1.8") like my Cordoba.
ACOUSTICS: Cordoba D10-CE / LaPatrie "Concert" / Takamine GD30CE-12 / Norman ST30
ELECTRICS: EP Les Paul Custom Pro / Gretsch Streamliner G2420T / EP Thunderbird Pro IV bass
AMPS: Peavey "TF" VK212 / Traynor AM150T / Fender Rumble 150
EFFECTS: Boss ME-80 Multi-effects / Ibanez WD7 wah / Grand Orbiter V3 Phaser