Ofna Hyper 7, and 9.5 are darn good cars! I have the 9.5 RTR, and its basically the same as the pro minus the graphite towers,radio tray ect. The hyper 7 has a 3.5mm chassis a little stiffer than the 9.5 3mm chassis, but most buggies have 3mm anyway. The 9.5 comes with threaded shock bodies which are nice to have. Both are equally equiped and about $300 less than a Kyosho MP 7.5 K2.
I've been talking to a few fellow buggy racers and most agree that the Mugens are top on there list, and the ofna's are not far behind, of course the MP 7.5 is up there too, but again most feel that its way overpriced.
Dont listen to people when they say parts for ofns's are hard to find, Tower hobbies, and nitro house keep them all in stock.