Your opinion, please. Should I stay with these or start more?

Hi all. I have about 5 true websites, 2 of which I am making money with. These 2 sites I have are review sites, but I am starting to add articles and such to one site to build an authority site.

My other site, though, thanks to the new google changes, has hit #1 google spot in the ex back niche, and first pages on yahoo and bing (yesterday, anyway).... lmao, I havent done ANYTHING for that site for a few months. Go figure... anyway my real question to you is this...

I have something that is FINALLY working. Some say to rinse and repeat, and others say to stay with one and build on it.

I DO know how to do this, but just curious if I should keep expanding these, or if I should start more? The other 3 sites really suck, but I haven't done much with those yet. (Not ready for outsourcing just yet...)

Should I work more on the one that is getting regular sales, and try to make it rank? Or should I build on the one that IS ranking, but not making as many sales? :confused:

Just looking for opinions from someone who's been there. I know there are no 'answers' except for my own.

Thanks!
~Haze