feza
When you say the triton series of reels, are you meaning the tld 2 speed 50's? If so, you can fit around 650m of 24kg line on them. The reels are great for standup fishing and have reliable drags and components. Once you start fishing with heavier lines, the two speed can be a great help. The only draw back with these reels when compared with the likes of a Tiagra, is the reduced line capacity. I would only say this would be a problem if you were fishing for blue marlin, etc.
What size tuna are you expecting to encounter? I think 2 speed 50s are bigger than you need to catch wahoo and macks.
CJ