I have been mostly active in the development of PayCon but I would not suggest putting all your eggs into one basket and to diversify among different Coins. If you buy a large amount of one type of POS Coin you also need to be able to sell that amount as well so the larger amount you have in any one Coin, the harder it is to sell into any buy support or to put on sell orders to wait for other people to buy. There are two types of POS, passive and competitive Staking, passive coins give you the same percentage reward based on what you own such as MintCoin, TekCoin, HyperCoin, or MaryJaneCoin, competitive POS give a fixed reward per Block such as HyperStake, PayCon, Clams and Bitbeans and for these Coins it relies more on the sizing of your Blocks in order to receive maximum reward and general rule is more Blocks give you higher rewards and can receive over the actual inflation as there is never 100% Stake participation. Best place to start is to begin researching Coins in the list, looks at what types of volume each Coin is doing, how much inflation they pay and then start asking questions, look for good entry points.