From an "economical" perspective, I agree with you, PoS can make sense as a component of the economic model.

My favourite would be a mainly PoS/PoB model with PoW slowly declining in importance due to the difficulty model where PoW rewards decline when the hashrate/difficulty grows (I think that's the actual model, or at least it was the original one). What I don't know is if it is harder from the programming/stability perspective if the three models coexist. Now without PoS at least my client works very fine.

I am planning a thread in the main altcoin forum with a at least weekly report of the main Slimcoin statistics, to draw conclusions about the PoB activity and its relation to price. Actually I'm writing a little script that reports the main data for SLM like the burn address balance, nEffectiveBurnCoins, price at BTER etc.. every day at the same hour, so I can compare data more exactly. Obviously, a planned side-effect is to draw more attention to SLM