You want to go smaller & lighter than the 1541T? Try the 0531. I used that with the RRS 25 head for awhile, but got tired of always bending over, so went to the Feisol CT3441s. This is a great combo for me, but I don't think it has any advantage over your 1541T (except price). Looks like what you've got is pretty good - anything else would give minimal weight savings unless you give up a good bit of height and go to a head like the RRS 25, which would be marginal for your camera gear.