Pretty much the consensus on the MS board is the MA-15DX for crank trolling and I don't see why it wouldn't work for long lining as well. I've heard bad things about the Cabelas Line Counters though and I'd probably stay away from them. Sat has been buying up Diawa LC models from Ebay lately. He says they seem fine and are a bit smaller in profile than the Okumas.
If you're going Okuma, there's only one link you'll need Chodie.
Okuma Magda Pro Line Counter MA-15DX Northwoods Wholesale Outlet
Wannabe...