Ok i'll try to answer your questions Kendo (though I'm sure I'll fall short).
As far as AC goes: I think you get one more due to balwark 2 but it does cost some AP.
Your dex/wis based monk: This build is very much like your curent build (though the multiclassing adds some hp and other benifits) and your current build is only a 1st lifer so you'd be building a second lifer for this and this is set up to be a 3rd life build (though doable on a second) you might want to run a second lifer just for the pl feat (barb for the hp, art for the umd, fighter for the to-hit and +1 dc) at end end game you could grind for gear in your second life and TR into this with most/all your ducks in a row. Having said that you'd be fine with sub par gear as long as you aren't tring to tank things out of your range (like elite ToD or hard LoB). Anyway i think you get my point here.
I would think using the same starting stats would be percfectly fine. I am on my 3rd life with this toon now and used slightly diffrent starting stats due to the tomes I had stashed away (+3 wis,int,con, and +4 con). I also went human for the extra toughness feat.
All-in-all there are many gives and takes on the DoS vs SD, but the main reason I decided to DoS for now was pure speculation on my part (for the summer exspation). I'd go into that but whats the point noone realy knows whats going to happen. I'm just making a stab in the dark and hoping for the best.