Gitzo are the preferred brand for tripod legs for many people, including me (I have a G2220 Explorer). Unless you want to use very heavy lenses (in which case a 3 series tripod may be more appropriate), the 2 series tripod you mention sounds to be a good choice.
I believe there's at least one forum member with a 468MGRC2 - if you're going to go for Manfrotto quick release rather than jumping to Arca Swiss, RC2 is probably the most appropriate system (I use RC2, even though I have a Gitzo offset ball head, which is something of a specialist design to get maximum flexibility out of the Explorer legs and can't be recommended for general use). However, the 488RC2 may do all you need, and it's cheaper.
Consider buying 200PLARCH-14 anti-twist RC2 plates if you go for RC2 - they were something of a miracle in my setup, as I was getting terrible problems with plate twist with the camera at certain angles. These plates sort it out.
David