Be very careful about who you get to fit your clubs as a lot of guys who work in golf shops are not qualified or experienced enough.

A guy I play golf with had his clubs 'custom fitted' in store when he bought them. All the shop did was take a hacksaw and cut about 1 inch off the shafts. He hits everything out to the right 'cos the lie angle is too flat and the swingweight is miles too light.

I'm on my third set of custom clubs now - the first set were very,very expensive by a company that drags out a cart of clubs (lets call them GH's) and the pro hands you club after club to hit. After a year of horrible golf I gave them away. They felt great but anything would have been better, really - anything.
This same company fitted a buddy of mine for clubs 3 inches longer than standard.

The second set were fitted and made up by a clubfitter using Golfsmith components. I paid extra to have them swingweighted carefully - they never did it and the SW's were all in the C2 - C6 range. At first delivery was going to be 4 days, then another 3 days...then another 4 days. In the end it took them 3 weeks to hacksaw and glue them.

My third set is 3/4 inch shorter than the 1st set and 3/4 inch longer than the 2nd set...just right. I hit them dead center.

If you decide to make up your own clubs from components it is really easy to do and all the info you need is freely available in books or the net. Just remember that unless you invest in a minimum amount of equipment you won't know what you have made.

I recommend finding a fitter with a pro looking shop (many do it in their garage) who deals in quality gear like Wishon and SMT. Haunt the clubmaker forums like www.wishongolf.com so you can cut through any B/S and pure sales talk.

Good luck.