quite a few of these widget threads keep coming up. there was another one here:
https://forums.macrumors.com/threads/93773/
but that was a while ago. in that thread i talked abut how i was going to mod some widgets. and i did.

here's the result:
the orginals are on top, and the mods on the bottom. i wanted to get them all looking 'Matrix-style'. the TubeClock looks really good, but it just takes up too much screen space.
here's the final shot of NetAct and the FlipClock mod:
i still use the modded FlipClock - i like it's smaller size now. i didn't need the date because i've already got MenuCalendarClock...
but i'm not using that version of NetAct because there's a new version out, and i haven't modded it at all (actually, i might change the font to Monaco some time...). the new version is good as well - it keeps the totals. the old one used to reset at either 4GB up or down but the new version keeps going.
so the widgets i currently use:
Slickies
NetAct
FlipClock (modded to show time only)
there's a few others i play with like the dancing Gir widget.
i can't say that i really notice any slowdown, because i have been using Konfab for as long as i remember. so i guess i've forgotten what it's like without it.
