It may be difficult, but try to hit with some different custom cues...maybe friends will let you hit a few with their's or a dealer may let you hit some. It is difficult, at best, to explain the subtle nuances that come from custom cues, and the differences between the cuemakers.
There are many quality cuemakers out there, but their cues are definitely different in construction, balance, shaft taper, hit, etc. Take your time, you will probably have the cue for a very long time, so choose carefully. Try to narrow your selection to a few cuemakers whose work you like, then try to hit with some of their cues and make your selection.
Another issue is whether you want one made or want to get one off the secondary market. Having one made will take time, but you get exactly what you want, and usually at a lower price. The secondary market offers immediate delivery, but usually costs a few dollars more. If you have an opportunity, go to the Derby City Classic or the Super Billiards Expo. These are the premier spots to see a huge variety of custom cues.