Which is better: having just a few products, or have those same products, plus alot more similar to those?

I currently only have about 5 products on the site. I am thinking about upgrading that to 10 (but probably no more since I try to keep the product quality as high as possible). I don't want to dilute each individual product or give the customer too many options (unless this is preferable).

Kinda a hard question to post (and probably to answer).

Thanks,