I'm using Genesis Mining over a year now. So for so good. No issues with payouts. You can also distribute hash power between different coins, e.g. 50% BTC and 50% Dash, but there are more to choose from.
You can aslo use my code 1CZMnN during check-out to get 2.5% more hash power for free. Enjoy
Yes it is, you can only buy SHA hash share. X11 was always grayed -out (they never really offer it as an option, probably there is still no ASIC for it?) Scrypt is also still out of stock for a long time, but you can buy SHA and then change payouts from Bitcoin to Dash in your settings. I currently have 50/50