I also love my Juki, sews a very straight stitch, runs fast and has a good work area. I know it's heavier but not that bad. I just feel it's a good running machine, I have many miles on it, as I told my friend and her reply was," And most of it was over the speed limit."
I worked in a sewing machine store for a while and was told that the reason the old machines stitched so nicely was because they only had the one stitch. So I had rather have a Juki than a feather weight any day. Of course there are other machines on the market that are straight stitch as well. I guess if you're nostalgic you need a feather wieght, but if I had one, I'd still be on my Juki.