XRP Ripple and XLR Solaris
not because both have an "X" in the name but becaose of its features.
XRP i think you well know shuch usefull coin
XLR less known currently but with huge potential. zerocoin protocol, POS,POW, masternodes and also fast payment and not little fees.
I am not professional advisor, but i think thet everyone should read some text about these both currencies. And then decide for yourself.