Juan - Sickle mowers really limit a person in this part of the country due to moisture. There are times the grass is still wet at noon, though we don't have that problem this year.
I run 3 New Idea disc mowers and have for about 7 years and have had good luck. They don't plug up when you hit a gopher mound or dirt clod. Bought a 13' Krone last year and really like it the best. May not when I have repairs, but so far it has done well.
I highly recommend mounting them on a mower caddy and not the three point as they seem to be hard on the hydraulics. The Krone mower is so heavy we mounted it on a caddy and had to add 600 lbs of tractor weights on the off side to keep it from tipping over. It's the pits going down the road, but works good in the field.
The mowers work best keeping the blades sharp, but touching them up w/ a 4 1/2" grinder is fast and works well.