It really does depend. I used to like Boge, but that was back in 2010 and the first half of 2011. Since then I've been 100% Ikenvape for cartos, but they aren't for everyone. His 801 fusion standard length has dense filling, tight draw, excellent consistency/QC, I ended up going with a dedicated 801 topcap so I could use them without an adapter. The 510 platinum is very nice for native 510 connections, again I've had consistent performance. I haven't tried the 510 fusion, or the megas, because I've been happy with the ones I mentioned. I do punch my own cartos (My tank has fairly slim endcaps, and I like the punches to end up just above them), though I'm confident that Ikenvape Punch versions would be solid.
LR, as others noted, is primarily for use on "fat battery" egos/rivas (> 650 mAh typically), or single battery unregulated mods (ones that take a single cylindrical battery, with separate battery charger).