Technicare also recommend that you turn your monitor up to 100% in their colour management section! ......... I don't think so. I'll ask them for a profile and check it.
EDIT: One of the widest gamut papers that they offer would be Kodak Supra Endura (Glossy) and they probably use Durst Lambda print processing.
Below is a plot of the paper profile vs sRGB & aRGB. Both of the colour spaces exceed the paper profile in areas, and the paper/printer combination exceed the colour space in other areas.
The paper/printer combination intersects 55% of aRGB and 71% of sRGB.
This is very common. Some of the very latest 12 colour inkjets would have a slightly larger gamut on this paper but not by much.
The first is sRGB in the Red wire cage, the second is aRGB with the Red wire cage. The Kodak paper is the solid colour plot.
The plots are rotated to show the worst case (mostly some blues, greens & yellows) but these extreme edges of the colour gamut rarely exist in nature.
So, my answer to the origional OP would be to stick to sRGB as it is the most universal and as a general rule, would encompass most colours you would encounter.