I watched a few Lorbek games yesterday (not that Finals game, though) and I'm pretty damn impressed. Yeah, he's not a fluid athlete and his rebounding potential probably maxes out at Bonner's level ... but the guy is talented as hell. If he were even a B athlete (instead of being a C athlete) he'd be a can't-miss prospect. As it is, I think the Spurs have to bring him over.
At worst, he's a player who should be able to step into the stretch four role off the bench once Bonner declines (which will probably be after next season at the latest). At best, he's a middle class version of Memo Okur. Considering Okur was an All-Star once upon a time, that's a pretty damn high ceiling.
The best thing about him is that his skillset works so well next to both Duncan and Splitter. And Parker, for that matter.
Euro bigs have been translating really well recently. Plus his cost can't be too outrageous given his situation. It'd be a little bit of a gamble if it takes a Splitter-sized contract to land him ... but I think it's a gamble the Spurs have to take considering the alternatives. There's not going to be a bigman in the draft or in free agency that they can land for similar money that has as high of a ceiling.
*hops on the Lorbek bandwagon*