I recently purchased a pair of the new STI Spartan V pistols, one in 9mm and one in .45 ACP. I like the new look
Although these are Rock Island underneath, I think they exhibit slightly
better overall fit, and they have STI fire control parts, as well as LPA rear sights and dove-tailed fiber-optic fronts. I really like the new grips and the high-cut front straps, and even the hard-chromed barrel.
They both got standard guide rods/plugs, a steel MSH and Ed Brown's slightly extended mag releases (ala Kimber), plus a bit of skate-board tape on the front strap.
Both run fine, and are more accurate than I expected.