I would recommend what I am using now it's called WET Platinum
you could see what i'm talking about at
www.wetinternational.com
The bottle is personally what I want my penis to look like one day, it's probably 9x7
The lube itself is long lasting and works in water!! You can seriously jelq IN the bath, which I do sometimes, and it doesn't wear off either
One thing though, this could be my dick, but I think it's the lube's fault, for some reason I lose all sensitivity and can't get full 100% erections, only like 75's, this is an advantage because it helps me resist saying "Fuck it" and beating off and cumming. BUT I hear that you get the full benefit of jelqing at 100% erections, but I can jelq much longer with this stuff.
With KY, I would always say fuck it and just jack off, not getting any benefit since your supposed to wait a few hours so that your dick is in a slightly aroused blood-filled state.
Personally in Penis Enlargement, after I jack off I go back to my pre-Penis Enlargement flaccid state (reallly small 3 inches), but I average (if I haven't beaten the meat) 4-5 inches flaccid these days post-Penis Enlargement!!
Thank god for Penis Enlargement, i haven't noticed much erect gains, but flaccid definately, I think I'm gonna see erect gains soon.