"Is there anything I should absolutely purchase new instead of used?"
IMHO, get a new cartridge. I don't like the idea of a used cart--they're very, VERY fragile creatures and all manner of things could cause a used one to not be up to snuff...and re-tips are not cheap.
Other than that, used is fine, and you'll find some great deals that way. In my system, the Gyro SE was used, the tonearm was new (but purchased right before the price hike), and the cart was off my old 'table (and is currently out of commission, grrr...).
I will move over and let more experienced folks help on the specifics, but IMO $2500 will get you a very good TT/arm/cart, especially if you get some good deals...but I'd up the budget some more to allow for a good phono stage and cleaner, if you can. If you're into DIY, you can save quite a bit of money building a cleaner. Don't skimp on the phono stage.
IMHO, get a new cartridge. I don't like the idea of a used cart--they're very, VERY fragile creatures and all manner of things could cause a used one to not be up to snuff...and re-tips are not cheap.
Other than that, used is fine, and you'll find some great deals that way. In my system, the Gyro SE was used, the tonearm was new (but purchased right before the price hike), and the cart was off my old 'table (and is currently out of commission, grrr...).
I will move over and let more experienced folks help on the specifics, but IMO $2500 will get you a very good TT/arm/cart, especially if you get some good deals...but I'd up the budget some more to allow for a good phono stage and cleaner, if you can. If you're into DIY, you can save quite a bit of money building a cleaner. Don't skimp on the phono stage.