Can't go wrong with a Wuhan china.
They sound pretty good and they're dirt cheap. If anything, you should just buy one because they're so cheap. As for the sizes, they range from 12 to 20 or 22 inch I think. The bigger, the lower the pitch/freq.
For splash, if you like bright sounding (almost "bell sounding", with minimal wash) then Sabian B8 pro is your friend. They're relatively cheap, and I personally think the smaller sizes (8 - 10) are pretty good. They won't break easily either.
Wuhan makes splashes as well, which are a lot cheaper than Sabians but they aren't as bright and glassy. They're still good accent cymbals though. I love Wuhan.
Be careful with these though, because their splashes break really easily, as they're pretty thin.
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