I have 2 Calcutta's A 251 and a 151. Both reels have performed flawless. mainly use the 151 for mylight steelhead fishing. The 251 sees both steelhead and salmon duty. Yea the gear ratio is a little slower than a Curado, But the Calcutta is a heck of a lot more durable. Both my Curados are all messed up.
The Shimanos are better reels than than 6 Abu's I have. I have 3 5501s 2 6501s and 1 5001. All my 5501s have had major problems. The springs wore out, The level wind gear popped out of the end of the spoolwhile fight a fish. On the 6501s the nylon gears that work the level wind have stripped.
Go with a Calcutta you wont be disappointed.