Just to clarify a bit about the list I just posted and how I use it.
In general, the most appealing items are the ones with both haste and crit on them. Blizzard snuck in a few such items in tier 7 to test the waters, and they were so coveted that the devs have since gone hogwild on us. There are now lots of these double-statted items in the game.
Those items alone have me swimming in haste. This is why I have such a strong aversion to haste-only gear. From day one in ToC, I've passed on every haste-only upgrade. At this point, I will only equip a double-statted item or a crit-only item. For example, the Jarax10h crit pants, while "only" iLevel 245, are far more useful to me than even the 258 tier pants, which are all haste. (Any ranking list would put the tier pants higher…hence my disgust for BiS lists that have no context.)
As it is, my current unbuffed stats are: 2500sp, 23k mana, 35% crit, 20% haste (with talents). Regen is 460 inside, 243 outside 5sr, plus Solace and meta gem. Mana remains a non-issue. If and when that changes, I'm ready to start slotting intellect gems. In a heartbeat.
For reference, here's the Lootrank page (now GuildOx apparently) that I used to help build the gear list. It is a ranking based on pure throughput. The numbers are of course soft ("why the hell is the haste coefficient 0.48??"), and rankings are flexible for a thousand reasons. It's just something to work from.