Well, I've put together a nice spreadsheet calculating PPS values and comparing them with payouts so far. It really shows some interesting numbers, but I think I'll still wait a bit until I release it to the public, as quite a few companies/bonds haven't even paid any dividends in April so far and you for example also just have paid for a week (showing ~23% of expected value on my chart right now). Stay tuned for May (or bribe me into releasing it early
It doesn't take into account current share values though, so if you just want to buy the cheapest bond per MH/s, the pictures ehre are certainly useful. If you want to know how high the operator cut in the shares is though and which ones pay out regularly and fairly compared to PPS values, I might be of help here...
(P.S.: looking at the numbers I now know why FPGA.CONTRACTs and PUREMINING shares are so expensive)