Do a search, yours is the most commonly asked question on the board. Personally I recommend against either of the bikes you mentioned, unless you got a few thouthand miles under your belt. Race replica's are "twitchy" and can get a new rider in trouble very quickly (they tend to act faster than you can think. Once you develop muscle memmory, you can hang, but at first a rider can end up on the ground before he even realized he made a mistake)
There are however several good started bikes. The 250/500 ninja's and gs500 are both good, but abit lacking in sex appeal. On the plus side, you can sell them for what you paid for them after a few thouthand miles, so no loss there. The SV650 is one of my all time favorite starters, becouse its easy to handle at first, but still offers enough not to be outgrown (Its actually one of the most popular track bikes), the F4i is also a choice to consider.
If at all possible, try to buy a used first bike. Chances are very high that you will drop it. No offense meant here, we all did that. A used bike isnt going to hurt your wallet and ego nearly as bad when it gets some scratches on it.