there is no question in my mind whatsoever. buy the flexcams. they are great cams. the biggest size gets a hard rap, so i originally bought 1-7. however, a friend had an 8 (the largest) which i used a lot, and i finally bought one of my own. if you put some thought into your placements, walking shouldnt be that big an issue.
i have a set of flexcams, and all the robots. i really like the robots, seriously. they are kind of like a really big 3cu with a lot of rock contact. they fit places the flexcam wont. however, they are not as flexible (in the does-everything-well sense) as the flexcams.
the forged friends are cute and light, but very limiting, as you have mentioned. the gunks tie-off annoys the heck out of me, too.
trango has a solid line.
best,
anthony