Rotosound Whites 11-54 Nickel Strings

I use this scale on all my guitars tuned to C#, and in general i've been using all scales of rotosound strings - with occasional expections - on all my guitars.
If you change strings once a week or so then look elsewhere - other brands sound a bit more brilliant when they're brand new. Rotosound, though, are very stable, and keep their excellent tone for weeks, months, depending on your average playing time. I have many guitars and i found that months of rest don't affect the tone a single bit.
They've never let me down, and i don't think I'll ever change brand.