@jk Not enough data for meaningful answer
What are you looking to do with it? Pi Zero is best for size and price, Pi 3 is best for having lots of resources available to do things, ODroid XU4 is probably best for horsepower
@jk 8 gigs of ram is a bit of a tough ask for an SBC but I came across this https://shop.udoo.org/usa/x86/udoo-x86-ultra.html
@jk If you can make do with 2 gigs something like this'd work https://www.tinyonesystems.com/products/banana-pi-m3-bpi-m3
@jk or the aforementioned ODroid XU4
@troubleMoney jeez for that much i'll just get a regular computer