A key value proposition to some of the most successful cryptos is the concept of a guaranteed limited supply (bitcoin - only 21 million will ever  be created; similarly hard caps for NXT XRP, LTC MAID, SCJX and others...)

I would VERY strongly urge reconsideration of going to a POS system if that means the hard cap of ONLY 5,000,000 (five million coins) is lifted; low inflation is NOT a consideration - I want precisely ZERO inflation with respect to a maximum number of units that will ever exist

Instead i would focus on imposing some sort of transaction fee minimum or some other method.

I am working on supporting a group of coins and for that purpose I am only interested in coins with a hard cap... the reason I got some BTA in the first place was due to the 5 million hard cap - that goes away, and so does my interest in the coin...

If you can come up with a way to do POS WHERE THE MAX COINS THAT CAN EVER EXIST AT ANY GIVEN POINT IN TIME REMAINS AT 5,000,000 then I am OK witht he concept of transitioning to POS

(just my two-cents for what its worth)