All the CQuartz coatings are quality. Generally you pay the most for Finest Reserve, because only a select few are allowed by the company to apply it. You can be assured a detailer who offers Finest Reserve is a high quality company. The coating is important, but the quality of the paint correction is what differentiates the best from the also rans.
If the company offering UK has good reviews, and the price is right, I wouldn't hesitate. In September 2016 I had my car paint corrected and coated with Finest (was before Reserve, which is now the top of the line CarPro product). My detailer is authorized for them, and the job he did paint correcting was astonishing. I actually had 2nd thoughts when I arrived at his shop and saw how shiny my car looked before...but after, I was blown away.
If your detailer is highly rated, and applies a quality coating, then price is the separator. For your comparison, and this was almost 4 years ago mind you. I am in the Bay Area, maybe even more pricey than where you are looking, but comparable for rates.
I paid for a 2 stage paint correction, 14 hours @ $75 an hour (he actually did around 25 hours, but did not charge me extra). $600 for the CQuartz Finest on all paint surfaces, 2 coats. $600 for Finest on wheels and calipers (he actually did some minor correction to address some factory blemishes on the wheels). $150 for CarPro Dlux on all the plastic cladding. He had it from Saturday (started on Sunday because he had obligations Saturday), and he was finishing up when I arrived late Thursday afternoon to pick it up.
One reason I mention all this is there is a great way to tell the highest quality detailers, by seeing who is authorized for Finest Reserve
CarPro Finest Installers make up a global network of professionals who proudly offer a warranty on our flagship coating.
cqfinest.com
Be aware that these guys also do exotics, etc., so if they are particularly pricey, you'll know why. My detailer details million dollar cars, but he gave my cheapo car the full quality treatment, and the prices were right inline with other shops
The thing I'd do 1st, is determine what shops near you are highly rated, then enquire as to what coating they use, how many coats, do they use UV lights to cure it, and also very important, how much? Often they can only ballpark before they know what level of paint correction will be required, they can't tell that until they put the car under their lights. My car was less than 4 months old, and the flaws and factory blemishes my guy showed me were surprising...again, it looked so shiny! But the before and after...wow
Good luck, I think no matter who you choose, or what particular coating they use, as long as they are highly rated, you will be beyond pleased
After correction shop pictures
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Almost 4 years later, still beads water, but not as crazy as when just finished
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A Guy