Hey Baggerguy, my name is Aaron I live in Cincinnati also there are few performance shops in-town also there are a few smaller shops owned by friends at mine that do all types of work and are much cheeper than the larger shops.
Also if you haven't already checkout the forum SWOV.org (south western ohio volkswagen) you can get allot of help from the users of the site we have weekly meets now they have slowed due to the weather but many of us have tools and knowledge to do the work ourselves which can save you money. All it takes is getting to know people and getting your hands dirty and some beer! As there are on many forums some people who just cause trouble but forget them if you join and just ask for help and people will lend a hand. I am new to the newer generations so I am still learning about the MK6 I have built many older cars like a mk3 2.0T and VRT plus some rabbits and mk2's. But I have installed my suspension and exhaust in my driveway on my candy white MK6 Golf and really working on your cars not hard just takes some time and patience to learn.
Good friend of mine Mark Bechtold owns Euro-Fixx he used to work at Northland VW for many years their number 513.232.FIXX (3499) the address is 7720 BEECHMONT AVE.
There is Dubwerx is a performance shop the owners name is Kevin they do good work and they are responsible for allot of big builds in the area. I also have two good friends that work there and trust them with my car.
5591 Wooster Pike
Cincinnati, OH 45227-4119
(513) 271-7767
There is also a really good mechanic shop called eurauto, they aren't a performance shop but are great mechanics but do performance work one of the only places I take my cars if I am not doing the work myself. Its a small fenced in shop, complete hole in the wall but they know there stuff. I have been there when there are everything from rabbits to ferrari's in the the garage.
5904 Bramble Avenue
Cincinnati, OH 45227-2998
(513) 271-8077
Its a little drive but in louisville ky there is Grossman Tuning which is a great shop that does all types of performance work.
http://www.grossmantuning.com/
Hope this Helps