Short answer, the 10 bolts will be fine and would be an upgrade from your current axles. Keep in mind that Chevy 10 bolts are basically Dana 44s. There are a lot of people that swear 10 bolts are junk but if you PM Mousee on here, he's been running them for over 5 years with 36" TSLs and the worse thing that has happened to him has been a carrier bearing going out.
Any axle can be destroyed no matter how "bulletproof" they are touted to be. Trust me, I shattered a Dana 80 ring gear by drifting my diesel crew cab dually.
IMO, don't pay to cut the axles down (unless you have to to stay street legal). The added width/stability will make it more worth while of a swap if you leave them full width.
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