Pre-U19, I would've said the fighter capstone (+10% doublestrike) was more important than any of that, esp. since Rage & defensive stance don't mix. However, in the new PrE system, the doublestrike bonus is in the Kensei tree, while the SD capstone is much less impressive: +2 CON, +2 tactics DCs, another action boost called Last Stand ("Your gain +100% Maximum hit points, +50 Physical Resistance Rating, and On Attacked: You are healed for 1d10 positive energy healing."). It is possible to take the capstone from one tree and the tier-5 abilities from another, so you could have Kensei capstone with Block&Cut from SD tree; the drawback is that costs so many APs (41 in Kensei, 33+ in SD) that have very little left for your racial tree.
If you're not going for the Kensei capstone, a pally splash just for Divine Grace is a
huge boost to saves; if you Twist in Bane of Undeath from Unyielding Sentinel, you can also use Divine Might. Unfortunately, if you were planning on a barb splash, that means you're non-lawful, so you can't take pally w/out paying for alignment change.
I've been leveling a pure dwarven defender the last month or so in a static duo: an old-fashioned "fighter+cleric" combo. Figures I would try to make a S&B tank right after Turbine turned monk "tanks" back into the "I WIN!" button.
![Roll Eyes (Sarcastic)](/forums/images/smilies/rolleyes.png)
Anyway, I'll try to post my build later.