I saw both of them last summer in my 4.5" - just
tiny little blue/green disks, but clearly disks. About a month or so, I turned my 10" loose on them. Guess what they looked like??? Yup: still little blue/green disks, just a little bit brighter
I tried to snap a few images of Uranus a few weeks back using the Rebel+Barlow, but it just isn't bright enough. Sure, I could rip off a couple hundred, and try and stack them, but at 6MP - its not quite as easy as that
<shrug> I'm hoping to have better luck with Mars, but so far, clouds, seeing, or both have prevented me from trying more than a couple of test shots.
I have seen some pretty decent amateur shots of both Uranus and Neptune, but I'm pretty sure they were taken with longer FL scopes than my 10" F/5. I'd bet a 12" or 14" F/10 or F/12 SCT would do well on them!