What can your pocketbook handle? How long have you been detecting? If you're a newbie (no offence intended) it might be easier to learn on an older machine without all the do it all bells & whistles until you understand what the machine is telling you.
If you buy a good older machine for a good price, and you change your mind you can always put it up for sale and make your money back, maybe even a small profit! If you check the ads, you'll see most of the machines in the higher end are being sold because the owner got overwhelmed by all the controls and meter readings. And they're selling at a loss.
Remember the manufacturers HAVE to add a new whiz bang thingie for the next new model, whether they're useful or not I don't know. I know an old boy that is still swinging a Coinmaster 6000DI factory hipmounted and I'll bet dinner he can hunt circles around most all of us! I've offered him other detectors over the years and he could care less.
He knows his machine inside & out.
In my opinion for what it's worth, until they come up with a detector that'll dig the find for me I'll hang on to the pile of detectors I've got.