I can't talk about the Kenda's, but have heard decent things about them. I have run the Shinko's and I'm still running them on 2 Ventures right now. My '83 has a set of the 230 Tourmasters and my '86 has a set of the 777's on it. I like them both, the 230's will wear faster on the rear, about 8K is all your going to safely get. The front will probably go twice that, so 2 rear to 1 front, but I run my bikes hard and love to play in the twisties.
The 777's are still new with only about 2500 miles on them but are wearing great. I wouldn't be afraid to buy them, at $150 for the 230's and $180 for the 777's, it's cheaper than shelling out $300+ for some of the brand names if money is tight. If money isn't an option I'll say Avon Venoms in a heartbeat....