You're very welcome.
If it's just for viewing on the tablet then I'm sure SD res would be fine and it'd sure save you a lot of space compared to your current HD encodings. It's just a matter of whether or not you want to maintain two archives or not, one at SD and one at HD.
The quality of my SD profile is considerable overkill for a 7" 800x480 res tablet screen, but it seemed to make sense to have them good enough to watch on the 32" TV too so as to save having to encode everything twice and maintain two archives, one for the small screen and one for the large.
I could have probably squeezed it down to get 40 full-length movies onto a 32GB card if it was for the small screen only, but I'm not greedy, so 30 is enough for me.