Well if you want your speedometer/odometer to be reasonably accurate then you want a 195/55/15. The 205/50/15 is slightly short and 205/55/15 is slightly tall. 185/60/15 is close, but not a common size.
In answer to a a cheap/quality tire I always recommend Champiros - or GT Radials if you prefer. They are also available pretty much anywhere because the local wholesale distributors carry them.
Champiro 328 if you want something that resembles a performance tire.
Champiro 128 if you just want a good wearing generic tire (cheaper too)
There's a million choices out there currently. I tend to just pick a price range and then pick the best looking tread pattern.