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I would take it to a place that specializes in alignments.
In MD there is a place (Certified Alignments) that only does alignments and the guy really takes his time to get it right and has the computer equipment to properly do it and he even gives you a readout so you can see what the final specs are. He's about the only person in this area that I trust.
I have not found any consistency between chain-type companies (e.g. Goodyear, Pep Boys, dealerships) etc. It took me trips to 4 different shops before I found someone that was both technically competent and interested in his work.
Ever since I found him (Joe at Goodyear in Granbury, TX, if anyone's interested), he's got all my business, and everyone that's gone to him on my recommendation have been pleased with his service.
Point is, try to find someone in your area that's good to go to. Top notch equipment won't give you a good alignment, and conversely, older equipment can do an outstanding job in the hands of the right aligner. Ask around. And find one that'll let you watch what they're doing.
Excellent advice above. I'll add, find the alignment shop that does fleet vehicles (Police, Fire, local utility company, etc.) in your community, and speak directly with the alignment guy. Tell him what your mods are, and your driving style, and he'll do the rest.
If that doesn't pan out, check with your local sports car club. They get quality, and fussy, alignments done for autocross, and can direct you to your local guru. Don't go with the cheapest price, go with the best quality.