Looks damn good to me Tom if its your first go

Zetecbeast - best thing you can do is to get your machine shop to machine some metal out of the throats when you get the seats cut. it cuts out a hell of alot of hard work! I usually work to a size for my porting work, my zetecs are 25.5mm inlet port, 24.5mm exhaust. just grind an old valve down to that size, or find a washer that size and stick it on a long bolt. when you can stick it all the way through the port, you're done

I'm no expert really, i just work in a machine shop for a living so love to tinker but you can probably get about 95% of the gains of a professional job by having a go yourself!

Only word of warning though, there is a waterway that goes through the exhaust port inbetween the valves, so be careful not to remove too much metal from that area

as for cams, stick with standard for that power level!