My favorite custom production companies are McDermott, Viking & Joss for USA cues, and Mezz for a Japan made cue. Those companies all make great cues that you can get into for a very reasonable price.
My favorite custom shop cue makers are Schon, Pechauer, & Jacoby for USA cues.
All these listed cue makers make great cues, and they all offer great values at different price points upto and over $1,000.00.
The main questions you need to look at in considering a buy decision are how much are your prepared to spend?, determine if you prefer a stiff hitting cue or soft hitting cue. In general cues with stainless steel joints will tend to offer a stiffer hit, and cues with an implex style joint will offer a softer hit.
But the type of tip you choose to use has a great impact on how a cue feels when your shooting no matter what cue brand you choose, and you need to experiement with tips to find what feels good for you.
Beyond all this, shaft tapers and construction types can make an impact what spin you can put on the cue ball and control, but figuring out what works for you requires alot of test & try time with various shaft types. Cue weight and balance can be another issue to affect how your cue feels in your hand when your stroking. But when you deal with production & custom shop cues you tend to deal with cues with adjustable weight bolts. And as you adjust your weight downward you will tend to get a bit stronger forward balance, and as you adjust your weight upwards you will tend to get a bit stronger backwards balance.
All of the above listed cue brands will give you a solid value for a custom cue that will last you a lifetime. But within each brand you have choices to make in terms of weight, tip size, design style, that will effect your final price. Thats it for my advice.