Depending on the gold you have from all of the dailies, there are a lot of BoE's from Naxx 25, Ulduar 10, Ulduar 25, ToC 10 and ToC 25 which can be huge upgrades.

Gearing the tank toon seems to be the most cost effective.

You can currently get Conquest badges (Ulduar 25 level loot) from just about every instance. In the next content patch (which is on PTR currently), we get Triumph (I think) badges. Well the new badges will be ToC 25 level loot. There is a thread, detailing how it will be 12 days of the easy heroics, to get the 210 badges for the 5 piece of Tier 9 gear or the PvP equivalent; chances are it will be over 2 weeks for most of us, unless we are already running heroics and are somewhat geared.

Raids take the same time basically. The current tough stuff takes a while, but the older stuff is easily farmed via pugs. They have put achievements in, which while they get you not much, do show what you have done. Some achievements get you rare mounts and others give you a title.

1-70 takes 30% less experience then it did when that was current content. You can RAF (or not) 1-60 in very little time. 60-70 is a lot faster then it was. With the "Interact With Target" keybind, melee teams are very viable options, and they play a lot different from caster teams -- a nice change of pace.