I use Esurface for general printing. The lustre coating will give it a glossier look (as well as added protection). I print about 90% of mine on esurface without glossy but that's just the way I like them. My customers, however, almost always request the lustre coating.
The metallic prints are awesome but you need to be careful with the subject material. It will cause things at both ends of the spectrum to 'blow out' or 'shade out'. My personal experience is that it doesn't work well with standard portraiture. I printed a macro butterfly wing and it pretty much rocked as well as a few landscapes where the shadows were particularly important.
For a nominal fee, they'll send you samples of all of their papers.