Rim Ding

  ding.jpg (Size: 293.41 KB / Downloads: 9) Well, this happened to my T130s rear wheel 

Typically it hit dead opposite the valve & so about 15mm from the rim joint, which has shifted as you'll see by the warped sticker & irregular gap *sobs* 
Obviously the standard rims are made of cheese and kit kat wrappers, so I'm looking to get new rims built onto the stock hubs. Any thoughts on Mavic 423 vs 729 ??

P.S. New rims will mean new spokes too as these are asymetrical, so I'm trying not to bust the bank on the rim bit as suitable spokes will be £96