[MpG]

That barb is what you need for the Thermochill rads. It's even in stock, go figure.

If you're shopping at Canadian Tire or Home Depot, any T-fitting made of brass or copper with 1/2" barbs will do the trick. Check the plumbing section. The 7/16" tubing will work on 1/2" fittings, you might have to soak it in hot water to soften it a little first, but it's a snug fit once it's on.

Thermochill's PA series are good, but I've never seen it demonstrated that a single can outperform someone else's double. If you have room for a double, you'll want it. On the other hand, if you're just cooling the CPU, a single rad should be up for the task.