Not yet I'm in two minds about putting it off for a while. I'm also after a little pocket rocket 400 to use as a small project bike then a track bike(again).
I had... A 400 and a 600 400 was the bike I used for mental days, so I didn't damage the 6! I still have the 6 although my mate is borrowing it right now as his VFR750 decided to blow a reg/rec.
I had a CBR400 along with my CBR600 Cracking little pocket rocket. I'm tempted to buy another one, try and squeeze a bit of extra power out of it and have a nice little missile to play with when the big boys are out on their expensive bikes