I've been on the hunt for the best line counter for many years. I have Okuma Convector/coldwater (old), Diawa accudepth/sealine/lexa/saltist, and shimano tekota (old and new). I've been looking for a Penn fathom LC sale, but they don't go on sale ever. A friend brought one on my boat last year, I really liked it. I have non-LC Penn fathoms for tuna and they're great.
Out of the ones I've owned, tekotas and lexas are my favorite, although the saltist LC is a trusty old reel, fast retrieve, many years in the salt. Lexa 400LC is a beast of a low profile reel, loud clicker, lots of drag, I just wish they made it in a 6.3:1 ratio. It's only offered as a 5.5:1 and it's a little slow at 27" per crank. Like others have said, personal preference.