Well I run a topline head, for $250 I got the complete head NIB on ebay. At about 8,000Miles mine didn't have any cracks between the valves either.
One more question: who supplies the cam? How well is the heat treatment process on these cams???
Not sure about the treatment process but a year ago at about 35,000 miles mine looked brand new still, and then :cry: due to my neanderthalish sledge hammer wielding methods, I managed to break it. :x I loosened the bolt holding the cam gear on about a 1/2 turn and started wacking it with a large deadblow hammer. I don't know why but after awhile I started hitting harder and finally POP.... :cry: :oops: the end broke off. I got a regrind for 50 bucks so it wasn't too bad. IIRC I liked the topline cam better, nicer finish and the lobes actually looked beefier, maybe I'll have to look at it again. A new one from topline cost $100 but they were out indefinitely.
Bummer about your rings Zuk, I'll steer clear of 'em but I'll run their heads anyday, if it wasn't for accidentally finding this on ebay I think I would of had to run my old head that was full of cracks. No way I coulda dropped 800 on a head.
Their catalog lists both hydro and solid lifter heads.