My advice would be to stay away from the condo unless you want to repipe it. I am a salesman for a plumbing wholesaler and manufacturer in California. My boss used to represent Quest pipe and is still getting depositions for lawsuits involving the product. Many building officials are now reluctant to approve other new types of pipes for us in their cities because of the lawsuits on Quest. One city, Santa Maria, Ca was named in a $5 million lawsuit because they approve the product.
It is not a matter if the product will fail, but when. Here in California, everyone in the plumbing industry knows about it. The 2 problems were that the pipe would split or the aluminum crimps would fail as aluminum expands easily with heat.
If the water quality in the area of the condo is non-acidic ( ph level preferably in the range of 7.5 to 8.5) go with type K copper. I would not recommend PEX pipe, but would recommend KITEC pipe. It is a composite pipe which has a 30 year warranty on the pipe and fittings, can handle a water ph range of 2 thru 12, is 865 times better insulating than copper, and offer 20 to 70% better flow rate than PEX. It is also the quietest pipe available. Look up KITEC on the web and you should be able to find their website. It is produced by a company called IPEX out of Canada, with offices in Denver.