I cant speak to those rba's because I have never tried them, but have heard several positive things about the penelope. I currently am using a lavagen and it does not leak whatsoever. I have a Z-Atty Pro on the way for my Provari (potential for leaks due to the top cap design, but we shall see) and I have an iHybrid Hell Raiser on the way (same type of design). My only gripe with the lavagen is the difficulty of accessing the coil which the other gennys eliminate by using a top cap, but by using the top cap design, it may not always be pocket friendly...but then again, you cant lay RBA's on its side. Alternatively, ibtanked.com sells glass carto tanks at a VERY reasonable price.....if you like carto tanks.
Carto's in general dont work for me - I seem to prefer wick systems. Maybe its because i started with the little eGo-C tanks.
Took me ages to even enjoy dripping and it sounds so simple!