[NOTE: The photos in this post are not to scale with each other. For example, a drip tip is not larger than a Riva.;-)]
I don't recommend LR cartomizers (up to and including 2.0 ohm) for skinny batteries less than 450+ mah, e.g. for use on your 280 mAh 510 XL batts. Boge does make great cartos and I would have recommend their standard resistance ones, e.g., $7/five-pack from
LiteCigUSA. But you have found that don't like them, nor the Joye brand. You might want to try the
SLB 510 cartos ($6/five-pack from LiteCigUSA) or
EastMall 510 cartos ($8 from Vapor Junction).
These all come with the ubiquitous white caps. You've said that you don't like drip tips, but you might like the flat-mouthed
Black Shorty Delrin Dripper Tips ($2.50 ea from MadVapes).
Your cartomizer options are limited with the low mAh skinny batts. Have you considered the higher mAh "
fat batts"? They are wider diameter than the skinny batts, but they are really not that "fat." [I coined that term 'fat batt' a year and a half ago and have some regret about it.

]
These would enable you to use a
wide range of cartomizers, including LR ...
and the dual coils (which I and many others think are quite special). You could pick up a compete kit (two batts, two attys, and charger) of the 3.7V 750 mAh
Riva-510 for only $30 from
Liberty-Flights. [Click on the "20% Discount" icon in the upper left of the screen first and select the "Lite Bundle" from the linked page.]
If these are too fat for you, allow me to share my latest enthusiasm: the brand new
Elite 808 from CigEasy; $50 for a complete two-battery/five-cartomizer kit. This Kr8-compatible model is
slightly wider than the skinny batts, but more slender than the fat batts. And the mAh falls between the two as well: 350 mAh, even more than your 280 mAh XL 510, but with a shorter battery. [NOTE: Since it is Kr8-compatible, it is
not 510-compatible, at least without an 808/901-to-510 adapter.]
Although I do like its cigarillo-like size and shape and its 2 ml-capacity cartomizer what I am
wowed by is the
exceptional vapor, while still having good flavor and moderate TH.