Here's my drive-train specs for my 8-speed LHT. This setup works great for me
Front Derailleur: Shimano Tiagra FD-4403 triple
Rear Derailleur: Shimano Deore LX, RD-M581, SGS, long cage
Shifters: Shimano SL-BS64 Bar-end, 8-speed
Crankset: Sugino XD600, 46-36-24t, 170mm arms
Cassette SRAM PG850 8-speed, 11-32t
Chain: SRAM PC-870, 8-speed