My Jamis Komodo (around the price range of the tantrum) is a really good bike, The tantrum and mayhem share the same frame i believe, i rode my mates Mayhem and when you pedal you can feel the steering wanting to go in the direction of the side your pedaling in...
Just doesn't feel right to me, Havn't had any problems with the Komodo, except that the stock breaks are shithouse and the forks, well they're RST's and apparently break alot on people...
And theyre going for about 600 bucks atm... Unless you buy a 09 one...